LBRY looks like it was restored not long after being delisted, so sounds more like either whoever was auditing it after a report got overridden after they challenged back the ban or some automated 'so many reports' system kicked it off before being manually restored.
There are some grey areas and places it gets conveniently overlooked though so long as they have sufficient NSFW-warning policies and make them require external links to access (Can't join a NSFW Discord Community without an invite link from outside the app, for example). Reddit
was banned years ago for pornographic content, but they restored it after Reddit made sure NSFW subreddits weren't included in the 'default views' for users.
For App Stores, you either get a process like Apples where you get vetted and challenge and explain and change prior to go-live, or you go-live quickly but could be taken down if they notice it and have doubts they want to address.
Not that I don't think there are problems with the big tech businesses, just that most of them can be understood through the lens of pursuit of increased user retention as a key metric, and fear of advertisers pulling funding, rather than active malice.