Other Active Starfleet vessels in Star Trek: Lower Decks

1. California-class U.S.S. Merced
2. Parliament-class U.S.S. Vancouver
3. Division 14 starship Osler
4. California-class U.S.S. Rubidoux
5. Miranda-class U.S.S. MacDuff
6. Luna-class U.S.S. Titan
7. Obena-class U.S.S. Archimedes

Star Trek: Lower Decks S01E02 “Envoys” and S02E10 “First First Contact”