Five week old barely sleeps during the day

I’ve tried everything. Nursing as frequently as he demands to ensure his tummy is full at all times, burping him after.

I’ve exercised with him doing tummy time etc. I’ve read to him, played classical music, the tv is off at all times. I’ve walked around with him, sat with him, took him in the stroller etc.

And even if he does fall asleep it’s usually only a matter of time before he wakes up. No matter where I put him, in his bassinet, the dockatot and I’ve even tried to have him nurse with me laying down and sleep next to me.

At night he does sleep for 2-3 hours at a time in his bassinet next to our bed. But that might amount to a total of 8-10 hours. He doesn’t sleep anywhere near the 17-20 newborns under two months supposedly need.

What am I missing?? Any tips or suggestions?