Is it weird that a man is looking at his exes tik toks?

I am in a situationship with a guy i’ve been best friends with for a while. he has told me before how he’s over his ex and the other day he went to look something up on tiktok and her name was in the search bar. It sorta turned me off. Am i right to feel like this is a red flag?
Is it weird that a man is looking at his exes tik toks?
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