4 month doesn't roll

Same! Absolutely hates tummy time but pretty good at holding his head up while being carried upright etc. In the last day or two he's been trying to "roll" which just looks like him having a bit of a spasm and throwing himself over. 🙈 he's not managed to make it over yet and I know he'll cry when he does. I remember my eldest hated it and I got a bit worried about him not doing it but think the 4 month sleep regression/development leap started the process and he was fine with tummy time by 5-6 months.

Don't stress too much your baby doesn't roll yet. Generally babies start rolling from 4 to 6 months, some do start earlier, but it's not a competition, everyone has their own rhythm.
To help your baby lear to roll, place baby on their back and using a hip slight pressure roll them on the side, then back on their back. Turn again on side using hip roll and give them a gentle hip roll back and forth to get them to land on tummy. Let them sit on their tummy a while and with same hip grab gently push them on the side, let them come on their backs. Repeat on the other side. Give them a short break and a feed if they're getting frustrated or upset. Once they've calmed down, try the same process- repeat during their wake windows. It takes some time for them to learn how to use muscles and gravity in their favour. You got this sweet mamma.

Mine doesn’t either please don’t worry. Mine just knows how to shuffle himself closer to me in bed 😅