No partnerspace on TRIP as of now, one base to rule them all.
It has often been said that updates will come in sync to all devices, i could be wrong thou.
Only the early access seems to be restricted to original Jolla Guine-- erhm customers.

Partnerspace is only some kind of wrapper around an existing app.
Like toons tv on Jolla Stella and Ganaa on Aquafish.
I guess coderus wil find out soon how to wrap up more (or every?) apps for partnerspace