1. requests to un-ban or un-suspend right-wing personas
2. removal of explicit death threats.
3. Anything against the vaccine - even actual, scientific data.
From the twitter files, the Twitter team that was wholly left-leaning spent significant time and debate looking for the mildest of excuses to ban right-wing politicians, building black lists for them and even gloating happily as they managed to kick them off. Not much doubt about that - actually no one has even denied that. There were several hearings also in the house judiciary where they even confirmed the same.
(Interestingly, there was pressure applied on Matt Taibbi to either "shut up" or relinquish all his sources to law enforcement. Also, as a form of indirect pressure to rattle him, US tax agents visited his house the VERY DAY he would testify before US Congress stating that his tax returns had been rejected due to identity theft concerns - despite him having the electronic receipt which showed it being accepted.)