The answer
A 20-word Trezor backup commonly uses SLIP39, not BIP39. A different word count and backup standard can make generic recovery screens incompatible.
What to do next
Identify whether the wallet expects SLIP39 and restore only on a device or app documenting support.
Trezor hardware wallets
Hardware wallet related to device/backup security; not a guarantee of recovery or anonymity. Availability, supported assets and local eligibility must be checked before signing up or buying.
Visit Trezor hardware wallets ↗Official provider link · Compare suitability and availability before choosing.