Diff Viewer in the works: a new cross-platform app. available on AUR:

yay -S forskscope

Also for other platforms, offered as executable:
https://github.com/forskscope/forskscope/releases/latest

'd love your early feedback : )

Personally, when using diff tools on my Linux desktop environment, I often felt there was room for improvement in certain features or the overall user experience. That's what sparked the idea to develop a new cross-platform diff viewer.