It is possible to use multisignature transactions with your Trezor device and Electrum and other popular multisig wallets, however it is not yet implemented in Trezor Suite. There are no specific plans for multisig implementation in Trezor Suite.

Here is our co-founder @stick showing demo of the multisig usage with Trezor and Electrum Wallet: https://www.youtube.com/live/40mdFIAEh4E?feature=share&t=9760