Currently, MetaMask (extension) and DeFi wallets don’t show the token, you can use OpenSea to see your token there. Just checkout https://opensea.io/collection/fnatic-citizen for Citizen https://opensea.io/collection/fnatic-pioneer for Pioneer and https://opensea.io/collection/fnatic-core for Core key, and search your token ID there. Go to your Membership section in the Fnatic ID, click on the key, and you will see the token ID there.
Paste that number on the OpenSea search, and you will find your key: