BTC on Taproot addresses is not spendable in regular transactions and not counted in your wallet's balance.
This includes BTC on a Taproot address that is not in UTXOs holding Runes and Ordinals; this BTC can be safely spent but - while on a Taproot address - it is shown in the NFT section as "COMMON/UNKNOWN" Sats.
These NFTs are chunks of regular BTC which you can send to your SegWit address to make them part of you spendable BTC balance. After this BTC is sent from a Taproot to a SegWit address, it no longer appears in the NFT section, and will be reflected in your wallet's BTC balance.
To find your SegWit address, click 'Receive' (in the NFT gallery, or on the Assets or Accounts tabs) and choose "BTC" as the asset. Your SegWit address starts with "bc1q".
Learn more about managing Taproot assets (like Runes, Ordinals and Rare Sats) here.