Hi @Soprano,
I can confirm that smart contracts cannot be used in Trezor Suite as our app does not support them. For interaction with smart contracts, 3rd party wallet (MetaMask) needs to be used. You can only use (receive, send) ERC20 tokens in Trezor Suite, more information on how to use ERC20 tokens can be found at How to use ERC20 tokens in Trezor Suite