I've found a fair amount, but these are the ones I've ordered so far to test:

https://www.amazon.com/dp/B0BRB2JY2H

https://www.amazon.com/dp/B0BS12H7JW Edit: This thing looks and feels cheap.

I want to order this but realized its shipping from China. Maybe I'll wait when it is on Amazon:

https://nillkin.org/smartphones-accessories/samsung-phones-accessories/samsung-galaxy-s23-accessories/nillkin-samsung-galaxy-s23-frosted-shield-pro-magnetic-case