You can always choose what you see on it. Like the subs you follow or common posts you look up or upvote are what appear on your feed.
I get it socal media can cause thoughts and triggers but it's also a erp exercise bc it's stuff that maje you uncomfortable with my social media I'll see it and then delete or hide the post or just acknowledge it abd scroll it's uncomfortable at first but you completely forget about it when you scroll through posts you like so it's a win win your standing up to ocd and you get to see posts you like to ease the uncomfortableness! You got this!
Me with Tik Tok cause I can’t control what I see on it all the time. I’m constantly getting content on it that just triggers me
You could try out site blocker so you physically can't go on that site, or you could download an app that controls and limits the amount of hours of a day you are able to use certain apps. It has a record keeper for that and auto locks the apps once that time is up. It's hard to stop googling compulsions like reddit cold turkey. So the app suggestion could be a good way to start, and gradually lessen the amount of time per day you let yourself be on the app until you don't do it anymore.