My LO was the same, I think it’s just a matter of waiting it out. I would suggest swaddling, using a white noise machine, and maybe singing or humming to them to help settle down. I’ve also been stricter with bath-bottle-bed routine and it seems to help. He’s 10 weeks corrected now and starting to sleep 5-6h in a row 😊 hope that helps, but if you’re already doing all of these, it’ll just be a matter of time 💪🏻
Sounds pretty normal to me. Sleep is developmental so I do think often with the best will in the world, they will just do what they want to do. My 15 month old can still have nights like that.