Baby Sleep Position Help?

My little girl is 5 days old and I can not get her to sleep on her back.

I will put her in her bassinet, in the middle, on her back, swaddled. By the time she wakes up, she’s on her side and sometimes has even wiggled her way to the edge of her bassinet. Half the time, the swaddle does nothing as she has her arms out and free.

Is this normal? Safe? Any tips for getting her to sleep on her back?