If mom goes to a nursing home, can they legally take all of her checks even if I'm POA?

If you're talking about Medicaid, then yes. All income is turned over to reimburse Medicaid for the nursing home bill, other than a small personal allowance each month. If you're not referring to Medicaid, then I have no idea.

If she is on Medicaid, like Carla said, then yes.

Bales, residents of nursing homes are expected to pay for the services. In my area, monthly fees are anywhere from $11 - 13,000. Any income up to that amount goes to the nursing home. And available assets are used to make up any shortfall. The POA doesn't have much say in this since the nursing home does have to be paid.
Is there more information you can provide to help us give you a better picture?

She is retired state of Oklahoma and survivers benefits and social security has about 5100 bring home

Thank yu for helping me understand about this p.o.a. w my mom. Cus she's in like a denial phase cus my sister won't talk to her and Idk what else to do.

What do yu do to get trust back w ur daughter who has panic attacks after I've ignored her being depressed