It’s normal to have a different perspective compared to your partner on how relationships should be. I agree that it’s weird to entertain other people especially those attracted to you while you’re in a committed relationship.

What you can do is talk to your partner about it.

My fiancé also do this and I also feel uncomfortable whenever he’s too friendly with coworkers or strangers who just happened to be ‘girls’ and the liking of ig photos and sending reels back and forth. But after a lot of talking and arguments, I can see that he’s trying. Not that he has to be cold and rude to other people but more like not forming a deeper connection that he has to spend more time with them or be physically close/intimate with them.

If it’s a platonic friendship, there’s also platonic boundaries. Your partner should know that.