Can The M1KE Monitor Multiple Brandmeister Talkgroups?

I know some hotspots can link more than one talkgroup.

Can the M1KE do that? If so, is it limited to a certain maximum number of talkgroups that may be linked?

Talkgroup linking/unlinking is handled entirely by the server/network. You can read more about this here: https://manuals.sharkrf.com/m1ke/basic/dmrusage.html