Passport prime will be able to store nsec and has NFC capabilities… maybe this will be an option in future?
Cc nostr:npub1s0vtkgej33n7ec4d7ycxmwt78up8hpfa30d0yfksrshq7t82mchqynpq6j nostr:npub15c88nc8d44gsp4658dnfu5fahswzzu8gaxm5lkuwjud068swdqfspxssvx nostr:npub1lqvv69u549atefvcyfht30lemlyvl9jnz4l7c6ejs20yzpq7hh7sjjfx0r