I remember that Azur Lane, Ark Knights and Girls Frontline were so popular in 2018/2019. I didn't play these, because I didn't speak English back then.
Blue Archive was popular three years ago, but sudden people stopped posting related things, apparently the last big update was the twins bosses. I see a lot of Chinese games where you control 3-4 characters, but none of them interest me, I also know that Uma Mussume is popular, but this game is like the Idol Master games with out the rhythm gimmick