Sleeping on belly

So my 2 month old son does not sleep on his back, he hasn’t for a while now... so we started to lay him on his tummy to sleep for a few hours and it works... but so many people say it’s “not safe” which I understand but there are so many other “not safe” things about sleeping on their backs and etc etc I just feel it depends on the baby ... he’ll fall asleep around 12 and wake up around 4 when he sleeps on his tummy

If he sleeps on his back he’s asleep from 12-1:30 😑

How many other babies are sleeping on their tummy’s ?