Soft spot on top of head sinks in when sitting all the way up

Lauren

Aidens soft spot on his head is completely level when he’s laying down or like laying on my bit if he’s sitting on my lap it sinks in. Is that normal? Like I looked I t up and it says it being sunk in in can be a sign of dehydration but he’s peed 10 times already today and has been eating normal and is alert and isn’t sleepy like I can wake him up.