Same I have even tried to import seed key to different wallet. The wallet seems to still exist on the blockchain but what I suspect happened the iphone app overwrote the old wallet with an empty wallet.
Pretty frustrated as all I did was try to use face ID and it cost me dearly.
None of the solutions posted have worked for me. The seed phrase which is definitely correct now seems to refer to the new empty wallet.
I really hope this becomes resolved, but from what I have seen so far I am not holding my breath.