For some reason that I don't know, they only allow one ETH or BNB address per newly account, which doesn't make any sense to me. Other OG software wallets I know allow one to generate as many address as they want under on HD wallet that can be restored by one particular seed phrase

Think if one really wants to use multiple fresh ethereum or BNB addresses minus going through the hassle of adding new accounts, then Trezor is not a good option.