Can I be jealous that my boyfriend is friends with his exes and people he’s slept with on social media?

I don’t know if it’s anything to care about or if i’m right to be uncomfortable about it? I don’t have any form of contact with people i’ve been with, not on any type of social media.

He made a new snapchat user because I was uncomfortable with him having his exes there, but now I see the girls he’s slept with on TikTok and facebook as well. I know that he’s with me now and that it shouldn’t really matter, but I can’t stop thinking about them or comparing myself to them.