Update to my request for non minty remineralizing toothpaste! Thank you a for your help.
After doing some research it seems I can pretty safely use kids toothpaste that's for 6+ years old. Baby toothpaste has 500ppm fluoride, while kids has the same as adults, 1450ppm. My dentist okayed this.
For anyone looking for your own use, look for kids toothpaste with 1450ppm F, and preferably no SLS (sodium laureth sulfate) which gives the foaming effect.
You can buy unflavoured toothpaste but it's hard to come buy. After researching I've found I can use 2 or 3 different supermarket products, which is so much more convenient than ordering online.
I looked into fluoride tablets, and they are not used or recommended anymore (at least in Australia).
Thank you everyone for your suggestions. Here is the original post for anyone curious. Check the comments for the suggestions I got. https://aus.social/