If I have installed Cryptomator on 2 computers…
On the first computer I have created an encrypted vault.
Would it be possible to copy and paste the encrypted vault to a second computer and open with Cryptomator installed on the second computer?
Yes. You can add the vault then as existing vault to your Cryptomator app on the second computer.
(That’s just the way it would be done if you do not copy the vault manually but sync it with your providers sync app)