If your girlfriend brought this up after only 6 months, how would you react?

My boyfriend and I have been together for about 6 months and overall things are good. We say “I love you,” spend a lot of time together, and this weekend I’m introducing him to my entire family, which feels like a pretty big step.
The only thing that’s really been bothering me is his Instagram following. He doesn’t really like girls’ pictures anymore (at least not that I’ve seen), but he follows a ton of attractive women, influencers, models, fitness girls, etc. Every time I see his following list it honestly makes me feel awful about myself. It makes me compare myself and question if I’m even his type.
For context, early in our relationship I also found out he added someone on Facebook that he’d previously slept with, so I think that made it harder for me to fully trust things. Nothing else has happened since then, but I still struggle with it.
I’m torn because I don’t want to come across as controlling or insecure, and I know people are allowed to follow whoever they want. At the same time, I don’t think it’s healthy that something as simple as opening his following list can ruin my mood.
Would you bring this up before taking the next step of introducing each other to family, or is 6 months still too early to have this kind of conversation? If your partner came to you with this, would you see it as a reasonable discussion or a red flag?