Are these friend groups or group chats? Your experience sounds more like group chats. Withing large groups, there are lots of subgroups.

I used to have lots of 'friends'. Wed all hang out, have beers, have fun. Then, when I was getting married, I realised there were a whole bunch of people that were just acquaintances. I didn't know them except on a surface level. Some are still in group chats I'm in.

My, now husband, and I made a rule for our wedding when looking at numbers. If their number wasn't in our phone (not a group chat) and we hadn't been to each other's homes, we weren't doing an invite.

I'm not trying to gatekeepn your experience, more that we should be careful to know there is a difference between friends, acquaintances and colleagues. I've been super friendly with colleagues but when either of us moves on, that's the end. Real friends meet up regularly and invest time for each other. It's give and take getting to know people on an emotional level, not just spending time together.