So I really have 2 problems now:
I took xpub address for Dash from trezor and used it with blockcypher API to generate addresses with paths like m/0, m/1, etc I sent some money to that addresses and noticed that trezor wouldn't show them, obviously it uses different paths than blockcypher.
I figured that easiest way is to take mnemonic and import it somewhere else, that would allow me to specify custom path, but I can't seem to find it. So I have trezor and I can access it, withdraw all the other funds from it, but I don't have mnemonic anymore.
What are my options to recover those Dash?