I have a player who is also very clearly there to be vibin with the friends. She's an elderly lady, who I had trouble adjust to because she will pivot to most simple playstyle possible (when she was playing Bard/Rogue she would each turn do sneak attack plus healing word and ignore other spells or bardic inspiration) and ignores plot hooks I place for her. It took me time to realize she is there to hang out with her friends and I don't have to press her to participate more, she is having fun just being in the group and watch others roleplay. She is okay to play any rpg, however, not just d&d. I actually plan to ask her, after we finish this campaign, to try moving to my other group, which plays more narrative games, as I see she struggles with d&d ruless.