I just have a vanilla repository setup (except for the choice of server):
Code:
Hit:1 http://debian.csail.mit.edu/debian bookworm InRelease
Get:2 http://debian.csail.mit.edu/debian bookworm-updates InRelease [52.1 kB]
Hit:3 http://security.debian.org/debian-security bookworm-security InRelease
So far none of the packages I routinely use have been unavailable.
I'm using KDE Plasma as my desktop, just as I did with Kubuntu.