Same question. I acquired three chicks from a guy on FB marketplace. They seem to be about 5 weeks old, so maybe they are too young to figure out how to put themselves to bed? For reference... I have an all-in-one coop from TSC with a "hen house" which includes nests - a small "Run" below where I keep food and water (it's on a grassy area, that they've nearly scratched bare) - and I have a good-sized run for them during the day - they seem to cling to the small run but venture out to the bigger one regularly.
I've been going out at dusk, to put them in and usually find them in the small, contained run but sometimes partying out in the big run. They don't like me handling them, but I'm gentle. I try to hold them gently before putting them in the hen house, so they start to trust me. An additional problem is I'm not an early riser - so they are currently on my schedule -- I don't get out there at first light -- but they are typically on the roost when I get to them - so they have figured that out. I'm wondering if the 8am rousing is keeping them up too late? (I'm starting to wake earlier, but before long it will be dark later in AM and dark earlier in the PM so it should even out)
I read somewhere to keep them in the coop for 2-3 days and they'll figure out bedtime, but I'm not sure if "coop" references the "hen house" or the "lower run" with the access to the hen house.