Pullets not roosting

[myCatalina]

Any photos of the roost to see if there's a way to improve them? Is the coop adequately lit at dusk (either naturally or artificially) so they can navigate and see the roosts?

Assuming the above are fine, if you don't have roosting adult birds it does usually take young birds longer to figure it out on their own. You can wait them out if you don't mind them being on the ground, or physically place them on the roost each night until they figure it out.

I put one in the original post.