The minisign bug was much less severe than the (insane) GPG signing bugs, and the age bug wasn't a cryptographic thing at all, just a dumb path sanitization thing. Minisign was not in fact affected by most everything GPG was. The GnuPG team wontfixed one of the most significant bugs!
GnuPG has decided a couple things are out of scope, fixed a couple others. Not all is in distro packages yet.
age didn't have the clearest way to report things - discord is apparently the point of contact. Which will probably improve soon.
minisign was affected by most everything GnuPG was, but had a faster turnaround to patching.