Haven’t spent a lot of time researching this, just got the first non-fluoride brand I found. But this seems to be working well.
Davids Nano Hydroxyapatite Natural Toothpaste for Remineralizing Enamel, Sensitive Relief & Teeth Whitening - Antiplaque, Fluoride Free, SLS Free, Peppermint, 5.25oz, Made in USA https://a.co/d/iQeF9bw