Working:
Trezor One (Mainnet and Testnet) + Taproot signing
Trezor T (Mainnet and Testnet) + Taproot signing
Keepkey (Mainnet and Testnet)
Ledger Nano S (Mainnet and Testnet)
Ledger Nano X (Mainnet and Testnet)
Ledger Nano S Plus (Mainnet and Testnet)
Not working:
Keepkey taproot signing
Ledger Nano S taproot signing
Ledger Nano X taproot signing
Ledger Nano S Plus taproot signing