[Bello Bashir]

Remove her from the nest: You can try removing her from the nesting area and eggs, and placing her in a separate environment. You can use a small portable coop or crate

[Bello Bashir]

Reduce her temperature: Broody hens have elevated body temperatures, so you can try cooling her down to reduce her broodiness

[Md. Osman Sheikh]

Her Carefully Gently remove the hen from the nesting area.

[Onu Victor Iko]

Good