Debian 12 users, how do you update your distro with backports? It does not work like with Bullseye:
apt -t bookworm-backports upgrade
That would work with Bullseye to upgrade your packages with all the backports and now it just does not find anything to upgraded on Bookworm
I added:
deb http://deb.debian.org/debian bookworm-backports main contrib non-free