[MariaDB discuss] Re: 10.7/10.8 removed from Debian repository: unable to upgrade Galera clusters

According to the documentation, when upgrading Galera clusters, skipping major versions is not supported.

What doc exactly are you referring to? I suspect it means skipping *Galera* versions. In my experience upgrading skipping the MariaDB 'innovation releases' works just fine, so you can probably upgrade from MariaDB 10.6 to 10.11 directly.