Delete the apps. I think out of sight, out of mind, is a good tactic. Isolate social media to one computer/tablet and then just keep limiting your time until you're using it less, and less. Getting the apps out of reach was a big first step for me.
I also keep the Nintendo Switch nearby. I've come to allow myself to take breaks, and I play Dead Cells for a level. Its the perfect amount of time to rest while also not completely losing context.
The other thing is that regular exercise for an hour everyday seems to improve my social media addiction. I feel better overall so I don't need the hit from social media.
edit: this is if the goal is full stoppage — limitation based goals have always been very difficult for me