Indeed, if am not mistaken others custodial wallets got ban in the US. I wonder if there are some implementation of non custodial wallets (I am just quickly browsing https://github.com/PrimalHQ/primal-ios-app) and I noticed a folder Nostr Tools .. I am not familiar yet.. just wondering if they using Apple Secure Enclave (secure element) https://support.apple.com/en-gb/guide/security/sec59b0b31ff/web