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(1x2) 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 for another 48 hours.
Tho not necessary a chunk of 2x4 for a 'roost' was added to crate floor, gives the feet a break from the wire floor and encourages roosting.
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If you
want her to hatch out some chicks, and how you will 'manage' it.
Do you have, or can you get, some fertile eggs?
Do you have the space needed? Both for more chickens and she may need to be separated by wire from the rest of the flock.
Do you have a plan on what to do with the inevitable males? Rehome, butcher, keep in separate 'bachelor pad'?
If you decide to let her hatch out some fertile eggs, this is a great thread for reference and to ask questions.
It's a long one but just start reading the first few pages, then browse thru some more at random.
https://www.backyardchickens.com/threads/broody-hen-thread.496101/
When I have a broody and want her to hatch I wait until she's been in the nest most the day
and all night for 2-3 days...along with those other signs I posted.
Then I put her in the broody enclosure with fake eggs in the floor nest, she won't like being moved, but if she is
truly good and broody she will settle onto the new nest within a half a day.
Then I give her fresh fertile eggs and mark the calendar.
I like them separated by wire from the flock, it's just easier all around.
No having to mark eggs and remove any additions daily, no taking up a laying nest, no going back to the wrong nest after the daily constitutional.
I remove barrier about one week after hatch. The chicks are usually safe it's the broody who has to 'fight' her way back into the pecking order...which can be quick or take a few days.
Lots of space helps for re-integration.