You’re going to have to remember what did you change. Is this bookworm? Things don’t just change themselves in Stable

Mesa is usually included in the backports repository some time after a release

Such as?

i386? meh.

arm64? I am a big fan, if there was a viable laptop/workstation PC with a good linux support, I would be first in line to buy one. Apple silicon? Last time I checked, it kind of works with a dedicated distro (asahi) and half of the things I take for granted doesn’t work yet (such as external monitor.)