We have two nexcloud servers with the following versions:
which version of the desktop client is compatible with these server versions, or at least which one is best suited for these two server versions.
Is there any compatibility list of desktop versions with server versions?
Thanks in advance
The newest desktop client version aims at supporting the recent three server releases. So the most recent version of the desktop client (at the moment 3.3.0) supports 22, 21 and 20.
See also: https://docs.nextcloud.com/desktop/3.3/installing.html#installing-the-desktop-synchronization-client
EDIT: But in general the desktop client should be also able to run against older server versions, but I can not recommend you to run older versions of the desktop client or running it against older server versions.