Samsung on AT&T used the carrier implementation of it at least on the S22, which is broke AF. They announced they will be moving to Jibe from Google, but no time line is available AFAIK. Until then we are stuck with a broken RCS implementation.

What are the different voyagers?

Classic answer of a mattress store. We have a very busy interesting in town, and they are on all 4 corners. Prime real estate, never a car in the lot.