Try to provide more information first.

So you have a Trezor Model T. You set up your HW, generated a seed, and sent bitcoins to one of its addresses. Is it correct so far?
Have you checked and confirmed that the address on your computer is correct and matches the one displayed on your hardware wallet?

What happened next?
Did you try to recover your wallet from seed and when you did the wallet was empty?
If the wallet is empty, does it show any transaction history? If you check on a block explorers, are the coins still in the address you sent them to? 

How do you know that a passphrase is required?
Have you written down your seed properly and you are 100% certain of the words? Is it possible that you misspelled something?