I'm having issues including large images in landscape mode

This is about as large as the image will render

Changing the size makes the orientation switch

Ideally I'd like to be able to have a large image on this landscape page, that's the reason that I've made the page landscape.

Also, it's important that the page within the pdf is rotated 90 degrees (which is currently the case), so that when reading the document on a screen I don't have to tilt my head to view landscape pages. I would like to retain that in any solution please.

Here's the example code

documentclassarticle
usepackage[margin=1.0in]geometry

% so that i can crop images
usepackagegraphicx
usepackagewrapfig
usepackagelscape
usepackagerotating
usepackageepstopdf
usepackagepdflscape
usepackageshowframe
usepackage[paper=portrait,pagesize]typearea


% this is needed for positioning images
usepackagefloat

begindocument

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Save the image from this link : https://i.imgur.com/CN1gsF4.png
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Required this package for including graphics and landscaping
% usepackage[paper=portrait,pagesize]typearea
% Link to the stack post
% https://tex.stackexchange.com/a/430619/69118

%%%%%%%%%%%%%%%%
% IMAGE TEST ONE
%%%%%%%%%%%%%%%%

clearpage
newpage
% Probably don't want the header for this page, so suppress it
% thispagestyleplain
thispagestyleempty
newgeometryleft=1cm,bottom=0.1cm
KOMAoptionspaper=landscape,pagesize
recalctypearea
beginfigure[ht]
 fbox%
 includegraphics[width=0.7textwidth]test.png
 
endfigure
newpage
KOMAoptionspaper=portrait,pagesize
recalctypearea
restoregeometry
cleardoublepage

enddocument

For when / if the image stops being hosted here's it's size :

file image-testing.png 
image-testing.png: PNG image data, 1600 x 1200, 8-bit/color RGBA, non-interlaced

Edit - code for zarko

documentclassarticle

usepackage[margin=1.0in,bottom=1.0in]geometry

% so that i can crop images
usepackagegraphicx
usepackagewrapfig
usepackagerotating
usepackageepstopdf
usepackagepdflscape


% this is needed for positioning images
usepackagefloat
usepackagelipsum

begindocument

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Save the image from this link : https://i.imgur.com/CN1gsF4.png
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Required this package for including graphics and landscaping
% usepackage[paper=portrait,pagesize]typearea
% Link to the stack post
% https://tex.stackexchange.com/a/430619/69118

%%%%%%%%%%%%%%%%
% IMAGE TEST ONE
%%%%%%%%%%%%%%%%

clearpage
newpage

thispagestyleempty
beginlandscape
 centering
thispagestyleempty
beginfigure%[htb]
 includegraphics[width=linewidth]test.png
 captionThis is some caption text that I'm using to see what this looks like with caption text. I'm not too sure about 
 adding text in the landscape environment, as I 
endfigure
endlandscape


enddocument

• 
  showframe in document with some page in landscape environment doesn't show correct page borders for landscape pages


• in landscape page you should for image width use linewidth since textwidth is not changed


• please use just one package for landscape orientation, not both: lscape and pdflscape (both will give in printed document the same result, but on screen pdflcsape rotate landscape page for simpler view of it content)

the following mwe, in which i omit all packages not relevant to your problem.

documentclassarticle

usepackage[demo]graphicx
usepackagepdflscape

usepackageshowframe
usepackagelipsum

begindocument
thispagestyleempty
lipsum[1]
beginlandscape
noindent%
XXX hfill XXX % for show width of text area
beginfigure[htb]
fbox
 includegraphics[width=dimexprlinewidth-4fboxsep-2fboxrule]test.png
 
endfigure
endlandscape
lipsum[2]
enddocument

gives

addendum:
now with caption and example image (instead it you should use your image) and removed stuff which in previous solution show size of text area.

documentclassarticle
usepackagegeometry% added nut it not influence on solution

usepackagegraphicx
usepackagepdflscape

usepackagelipsum

begindocument
thispagestyleempty
lipsum[1]
beginlandscape
 beginfigure[htb]
includegraphics[width=linewidth]example-image-duck% example image provided by "graphicx"
captionThis is some caption text that I'm using to see what this looks like with caption text. I'm not too sure about adding text in the landscape environment, as I use in my real document ... sorry, i can use image provided by you in textttigmur.
labelfig:landscape
 endfigure
endlandscape
lipsum[2]
enddocument

as you can see,image is centered in text area. since now fbox is removed, the width of image is determined only by linewidth

Just using landscape works fine ( I did my own version of your image, lol).

This solution ensures that when/if printing the page will be printed as usual and the person reading will have to tilt the book but in digital form the pdf is generated with tilted page.

documentclassarticle
usepackage[margin=1.0in]geometry
% so that i can crop images
usepackagegraphicx
usepackagewrapfig
usepackagerotating
usepackageepstopdf
usepackagepdflscape
begindocument
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Save the image from this link : https://i.imgur.com/CN1gsF4.png
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Required this package for including graphics and landscaping
% usepackage[paper=portrait,pagesize]typearea
% Link to the stack post
% https://tex.stackexchange.com/a/430619/69118

%%%%%%%%%%%%%%%%
% IMAGE TEST ONE
%%%%%%%%%%%%%%%%
clearpage
A normal text page
newpage
beginlandscape
beginfigure[t]
 includegraphics[width=linewidth,]image.png
endfigure
endlandscape
newpage
A normal text page
enddocument