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Few things to keep in mind:
1. Trezor gives exclusive access, if another app holds the lock, others can’t talk to it
2. Metamask memorizes data from Trezor, once you pair, you could run metamask for many years without needing to reconnect.
3. Your Trezor must use the same seed-mnemonic, passphrase, derivation, and chain-id when it reconnects as it did when you originally paired (all those years ago).
Take them one at a time. Ensure no other apps are running on your PC or browser tabs that may hold exclusive access, hope you remember the passphrase, derivation, and chain-id used when you originally paired.
similar thread: https://www.reddit.com/r/TREZOR/comments/s0v03l/