They are completely different wallets. NativeSegwit and Taproot wallets are defined differently. They don't even use the same derivation path for the XPUBs. Sounds like Stack Wallet implement it in a non-standard way.
BIP84 describes a NativeSegwit singlesig wallet.
BIP86 describes a Taproot singlesig wallet.
https://github.com/bitcoin/bips/blob/master/bip-0084.mediawiki
https://github.com/bitcoin/bips/blob/master/bip-0086.mediawiki
