My D was in a triple last year, her freshmen year. Roommate 1 found her people right away, partied a lot and adjusted right away.
Roommate 2 went to a nearby relative’s house nearly every weekend first semester, ate in the room a lot, didn’t really make friends until second semester. In hindsight, knows she shouldn’t have left campus so frequently.
D was somewhere in between. Took about 3 months to really feel comfortable in new environment and make friends. Joined a few clubs but didn’t go to many parties.
So, it worked out socially for all 3. They just adjusted at different times. None are living together this year, but my D runs into them on campus and it sounds like all 3 are doing great! It just takes time.