Copy paste from my other thread:
Thanks to some chat with Trezor support I found a solution (and in the end it was my own mistake): Problem with Yoroi/ADA and Trezor Model T - Third party wallets - Trezor Forum
Basically, when first creating the wallet I was an inexperienced user and when the Trezor connect window asked for my passphrase, I thought it was asking for me to create a password so I entered a password. Result is that I created a new hidden wallet on my Trezor with that password as passphrase, without knowing it. (Then I didn’t touch my wallet for several months and forgot the details of what I had done). When I use that password as passphrase the correct wallet is restored.
So for anyone else with the issue, try remembering if you entered a password when importing your wallet into Yoroi, and use that as a passphrase. Or try all your common passwords as passphrase (if you re-use passwords, which you shouldn’t). Best case that would restore the correct hidden wallet (that you didn’t know you had created).