The answer
No, not as a valid spend requiring the missing signatures. A PSBT can collect partial signatures across devices, but the final transaction must satisfy the script before it can enter the blockchain.
What to do next
Keep the PSBT and collect the remaining required signatures; check the destination and fee on each signing device.
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Trezor hardware wallet
Related self-custody hardware; verify supported coins, networks and recovery standards. It cannot reverse an already compromised seed or fraudulent transfer.
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Frequently asked questions
Does a PSBT itself hold any bitcoin?
No. It is a transaction-construction and signing container, not a separate on-chain account.