Switching VMware VM from BIOS to UEFI to Restore to Gen2 Azure VM

[PXAbstraction]

Hey all. I've got a bit of a niche case here I'm hoping someone knows.

We have a client with on-prem VMware VMs that are backed up to Veeam, and then copied to an immutable Azure storage account. They asked us to do a bubble test with a few VMs and one of their file servers could not start because it has more than 4 disks and Veeam was trying to restore it as a Gen1 Azure VM. When I tried to pick a Gen2 Azure SKU, Veeam said the source VM was not compatible with that. This is almost certainly due to the source VM being set to use a legacy BIOS instead of virtual UEFI firmware.

In my experience, you can usually just switch to UEFI with no ill effects, as long as you're not running an ancient OS that requires BIOS (which this VM isn't, it's 2019). I just wanted to confirm that here before having our client make the chance. If we switch from BIOS to UEFI on that VM, it should boot back up and we should then be able to restore to Gen2 in my mind. Any potential problems there?

Thanks!