Baby rolling back to tummy HELP

Breeana

My baby girl has been trying to roll her self from her back to her stomach. The problem is she put her face down on the mattress to accomplish this while laying on her side.And she doesn’t know how to roll back from tummy to back consistently so I’m kind if at a loss as to what to do. She’s in a halo bassinest rn and I’m wondering if I should move her to something bigger ?? Or any advice would be helpful