If you have created and unlocked your accounts using MetaMask browser extension wallet, in order to unlock them within MyCrypto Wallet you can follow this instruction:

Ledger Hardware wallets:

If during creating or importing your account in MetaMask you choose Ledger Live as selected HD Path per below image:

Then in order to import the same set of accounts, in MyCrypto Wallet after you connected to your device you should select Default (ETH) as per below image:

However If during creating or importing your account in MetaMask you choose Legacy (MEW / MyCrypto) as selected HD Path per below image:

Then in order to import the same set of accounts, in MyCrypto Wallet after you connected to your device you should select Ledger (ETH) as per below image:

Trezor Hardware wallets:

If you imported your account in MetaMask, since Trezor does not have multiple derivation path selection in MetaMask, in order to import the same set of accounts, in MyCrypto Wallet after connecting your device you can simply select TREZOR (ETH) as per below image: