The current plan is that amd64-microcode will be updated through the next point release for both stable and oldstable, which should happen in a few weeks. I was about to file the two proposed-update requests, in fact.
If you need them sooner, you could get them *now* from git: https://salsa.debian.org/hmh/amd64-microcode/-/tree/releases/bookworm?ref_type=heads https://salsa.debian.org/hmh/amd64-microcode/-/tree/releases/bullseye?ref_type=heads You could also try to build the source package already in unstable, or just plain copy the datafiles out of the linux-firmware git tree... -- Henrique de Moraes Holschuh <h...@debian.org>