Comment 2 for bug 1876276

gtk2 and python2 are obsolete.

... and so is anything that uses them.

virtaal in focal uses gtk3 and python3, and does not depend on python-glade2.

The rest are not shipped in focal.

How or why did you generate this list?

Ubuntu ships modern, maintained software, that is security supportable. When things no longer meet basic maintenance criteria, they get removed. If and when software gets ported to supported stacks, they do come back. If you want any of that software, do work on porting it, or publish it elsehow (i.e. as vendorized confined snaps).