for what its worth... i have a chicken cam in my coop so i can check on them and i noticed mine were not going in the coop or it actually seemed like they would be slow to go in the coop and some would then get stuck outside.
It seemed to me the coop was too dark, alot darker then the outside so I setup a 4' shop light on a wifi smart plug. about 30 min before sunset i turned on the light so as it got darker outside they saw the coop was lit up and they started going in there and when all were inside i turned off the light.
i did this for about a week and then i stopped using the light all together and now they start going inside a little earlier and are all tucked in before dark.