Rolling over back to tummy?

So my son hates tummy time. It’s been a battle getting him to learn how to roll over from tummy to back, so he’s on his back most of the time. Still hasn’t learned how to roll.

BUT

He learned how to roll back to tummy! What!! He did it during the night in his crib and I was just like “no it can’t be” so I would flip him over and now he does it all night, does it ok the couch, I have to strap him into his swing cause he tries to do it in his swing.

Anyone else’s baby already doing this?

I’m worried about him because once he gets on his tummy hes stuck cause he doesn’t know how to get on his back again