I don't usually worry about it. I'd like to be on a regular schedule but I've been lucky lately and haven't reverted to a rotating pattern of being up basically all night and then sleeping during the day.
I usually don't wake up and get up in the night and then later go back to bed. If I'm up, I'm up, then fill in with a nap later.
I only get concerned if I can't sleep at all and can feel incredibly tired but just not get to sleep. That's something I haven't had for months though and I don't miss it.
Laugh if you must, but if I can't sleep right away I watch an ASMR video, usually 20 to 30 minute ones and often the "spiritual" ones about "cord cutting" and "psychic healing." I don't subscribe to that but I can suspend disbelief and be calmed, often falling asleep and letting the TV turn itself off after the video ends.
Example (click Watch on YouTube):
There are many others doing these, of all ages including ours. There are others I find restful that include "eye exams" and other scenarios.