NEWS] IOS 13.3 is still being signed don't believe the posts that said it isn't signed so if you do need to downgrade or update to 13.3 go ahead and do so :
Hacker teases successful jailbreak on third iOS 13.3.1 beta
Apple smette di firmare iOS 13.5.5 beta 1 - iPhone Italia
Unc0ver Jailbreak Released with Full-Fledged iOS 13.3 support | by Ayush Sahay Chaudhary | Mac O'Clock | Medium