Thoughts on still having a past crush in social media while being in a committed relationship with someone else?

My gf and I had a big argument- is having a guy in your social media (ie Instagram) who you had a crush on in your past (ie 2020) but didn’t hookup with or go on dates with, while you’re in a committed relationship (ie since 2023) a red flag? I asked her during an argument this past Tuesday if she was attracted to him because I’ve seen her past likes on some of his gym lifting posts back in 2020, but she scoffed and said that his race isn’t even her type. I brought it up again today and she asked hypothetically what the issue would be if she had. I told her that I would then feel uncomfortable. She eventually told me today that she did have a crush on him back in 2020. She said that she told me no last Tuesday because I asked “attractive” and that she sees cute and attractive as two different things. Please help me out here