I've had plantar fasciitis but managed to cure myself with a combination of foot exercises, a night split, never going barefoot at home and the right shoes. I only needed the night splint and exercises for several months and this was perhaps 6 or 7 years ago.
My symptoms haven't returned, but I do stick to wearing shoes at home and good shoes for walking.
The best shoes I've found for walking are Hoka Challenger trail running shoes, I have numerous pairs of Hokas in different colours and also have Kaha 2 walking boots, Speedgoat mid and Transport trainers.
I also have various pairs of Finn Comfort shoes and boots and have found the Finnamic ones particularly good. I ordered most of mine from a shop in Germany https://schuherlebnis.de/. I have also bought multiple pairs to try and returned some for refunds with no problems, other than expensive post Brexit customs charges. Most were bought pre Brexit, they are amazing quality and last for years.
I don't think Fitflops are the best, although I have some Fitflop fur lined boots that I wear at home as winter indoor shoes, but I wouldn't wear them out for walking, they are not supportive enough.
My summer indoor shoes are Wolky Rio sandals which I love and have a different pair for outdoors too, although I don't think they make them anymore, but there is a very similar equivalent called Salvia. Luckily I have an unworn pair of the Rios for sometime in the future too.
Here are some pictures of all my PF friendly shoes.