You have no benefit from putting a veracrypt encrypted file/container into a Cryptomator encrypted vault.
I do not recommend that. And it does not make sense because you could just upload the veracrypt container to the cloud storage. You will also loose one of the core benefits from Cryptomator, which is file based encryption. Every time you change a bit of a file within the veracrypt container, you will have to upload that complete container because it’s just one file.
Besides that: a veracrypt container is nothing else that a file. So the answer is also: yes