Through experimentation i updated some of the url formats on here: https://en.wikipedia.org/wiki/Wikipedia:List_of_web_archives_on_Wikipedia.

IABot is also not handling Instagram links properly, see https://en.wikipedia.org/w/index.php?diff=prev&oldid=1061595799. While it does add a working Wayback reference, that link is currently dead (even if you get past loginwall) but it is marked as live.

I don't see what https://ghostarchive.org/archive/20210728022510/https://rms-support-letter.github.io/ is missing that https://web.archive.org/web/20210324012326/https://rms-support-letter.github.io/ doesn't. Both have the date and the URL.

https://en.wikipedia.org/wiki/Wikipedia:Bots/Requests_for_approval/Rlink2_Bot_3 may be the solution until this gets fixed

I //think// (but I am not sure my solution is 100% correct or on the right path) i coded out a solution to this, but it needs testing and debugging. I will submit a .patch file with my changes, but i don't know how to set up the testing harness.

This is still working:
https://en.wikipedia.org/w/index.php?title=Greg_Brophy&diff=prev&oldid=1051643633

+1 this, would love to see something like this