No need for us to move from testflight to app store currently since we can invite up to 10k users to the app using testflight. However eventually we'll need to move to app store.

We would investigate PWA, however the main concern here is security of funds. PWA compared to secure enclave on iOS is not even close.

We'd likely look at building a desktop folks people could download or build themselves.

For users, one of the nice things, is even if the app gets removed from app store, they can still recover their funds using any BIP39 compatible wallet, so there's not a concern of apple locking you out of your funds.