At the moment I have accounts on Facebook, Snapchat, Instagram, Twitter, and Threads but I would say that I spend most of my time on Twitter at the moment with Threads coming in a close second.
I keep saying I want to try and be more active on Instagram but I end up forgetting so it only gets posted on every so often.
I used to spend a lot of time on Facebook years ago but I found that it was a lot of people attention seeking or trying to make their life look better than it was and it wasn't good for mental health so I now tend to go on maybe once a day if I remember and have a quick check and leave.