Sounds broody to me too.
These are my go-to signs of a broody:
Is she on nest most the day and all night?
When you pull her out of nest and put her on the ground, does she flatten right back out into a fluffy screeching pancake?
Does she walk around making a low cluckcluckcluckcluckcluck(ticking bomb) sound on her way back to the nest?
If so, then she is probably broody and you'll have to decide how to manage it.
I'll repeat
@rosemarythyme ....
If you don't want her to hatch out chicks, IMO it's best to break her broodiness promptly.
My experience goes about like this: After her setting for 3 days and nights in the nest (or as soon as I know they are broody), I put her in a wire dog crate (24"L x 18"W x 21"H) with smaller wire on the bottom but no bedding, set up on a couple of 4x4's right in the coop or run with feed and water.
After 48 hours I let her out of crate very near roosting time(30-60 mins) if she goes to roost great, if she goes to nest put her back in crate.
Tho not necessary a chunk of 2x4 for a 'roost' was added to crate floor after pic was taken.