Debian 11 Bullseye has been released on August 14th, 2021. Does Plesk support this OS?
Yes, Debian 11 is supported from Plesk Obsidian 18.0.42 version.
Note: it is available only for servers with x64 processor architecture.
At the moment the following components are not available for Plesk installation with Debian 11 OS:
- ModSecurity Atomic ruleset
Also PHP handlers up to 7.3 version will not be avaiable on Debian 11 as they has reached their End of Life cycle and were deprecated by PHP project.