--snip--
You can also use iancoleman's BIP39 tool to extract the private key based from the "master private key" (xprv) and derivation path included in the descriptor.
It seems iancoleman's BIP39 tool was last updated on 2021[1] and there's no support for BIP 86 which about deriving key P2TR. Have you tried extracting private key from P2TR address with this tool?
After exporting that from Bitcoin Core, it's altcoin territory and you might need to create a new topic in Altcoin Boards on how to spend it.
Very short answer, OP need to find Ordinal-compatible wallet such as ord[2] (which require Bitcoin Core) or UniSat.
[1]
https://github.com/iancoleman/bip39/commits/master[2]
https://github.com/ordinals/ord