With the release coming up, I don't think anyone has made getting new versions of software into Debian a major priority. (So that's the excuse this time!)
(Post-release) As for 2.1, I'd like to get this into experimental -- and I'd like to keep unstable/bookworm on 2.0, since my understanding is that it is long-term stable, while 2.1 is short- term stable. If it turns out that 2.1 gets kernel compatibility updates faster/ more reliably than 2.0, I think that's a good argument to jumping to 2.1. But, some of the features in 2.1 look like they might be high-risk. I'm personally not moving to 2.1 for a while, for this reason. (This is just me musing right now, I'm certainly not able to give an official answer). Best, Antonio