If you want to delete all your old Twitter DMs (which I think is a good idea even if Twitter might retain copies of them somewhere), and also your historical likes, RTs, and any tweets you don’t want to keep, I made a Twitter app for that.
It’s called Semiphemeral and it’s pretty easy to use. I posted instructions for how to do it https://twitter.com/semiphemeral/status/1591258781098594304?s=46&t=L4aWvmyNxEFRL6eULgeO-A
Semiphemeral on Twitter

“As you watch in horror/delight as Elon burns this site to the ground you might be pondering your privacy 🤔. Do you have YEARS of tweets, likes, and DMs? https://t.co/EF6AVCPm2O Gather 'round, friends, while I show you how to DELETE THEM ALL (or as much as Twitter's API allows)”

Twitter
@micahflee great tip - thanks