Allo, Google Talk, Hangouts Chat (not the same as Hangouts), "Meet (original)", idk maybe some other thing called Google Chat that isn't the new Google Chat, uhh my Android phone has 2 "Messages" apps so one of them is probably deprecated?

Good article from 2021: https://arstechnica.com/gadgets/2021/08/a-decade-and-a-half-...