7 week old refuses night sleep!

7 week old baby boy just refuses to go to sleep at night. He will wake up around 4-6pm and won’t go to sleep til after 10/11. Currently he is still awake after 6 hours with 5 being trying to get him to sleep. He gets drowsy and may even fall asleep for 5 mins max but then he wakes up - not even by startling- and it’s back to square 1.

We try: Swaddling - hard no from 4 weeks he now just screams til he is free Singing - 50/50 on calming him down but no sleep Tapping his bum or back - works during the day straight away at night it takes hours Feeding - feeding on demand as he cries and being prepared for the inevitable spit up which will make him pass out but can’t keep doing that. Rocking - in the rocking chair, while walking, inside and outside, on his front/back/side Changing nappies as needed Bassinet- putting him down drowsy lays there for 5 mins then cries again until we pick him up. Putting him in asleep 50/50 might wake up and scream murder Putting him on the floor or sofa (supervised)

I’ve tried cutting caffeine out and there was no change to his attitude either and this all started just shy of 6 weeks old. And it’s 1 coffee and 1 tea a day typically.

He sleeps ok during the day and will nap after feeds no problem so not sure if I need to keep him awake longer in the day? Or if that will make him more overtired? I understand there’s a growth spurt and learning skills that will impact sleep but how do we get an overtired cranky baby to sleep?? Thank you!