My two month old hates tummy time

When I lay him on my chest or on a blanket on the floor he will try to lift his head for a few seconds but he really can’t, he usually just ends up with his face pressed up against my chest/the floor and then he’ll just turn his head to the side and lay down and usually fall asleep… he has a twin sister and she seems way more advanced than him she holds her head up really well and it’s hard not to compare them to each other.

I feel like at his age he should have better head control than he does… should I be concerned or will he just do things at his own pace? Should I bring it up to his pediatrician?