Azure Policy - Configure backup on virtual machines with a given tag

I wonder if somebody could sanity check something for me with this please in case it's something I could be missing.

We have this existing policy configured in a customers tenant (https://www.azadvertizer.net/azpolicyadvertizer/345fa903-145c-4fe1-8bcd-93ec2adccde8.html

After creating a VM and allocating the correct tag etc. it didn't automatically have the backup policy assigned to it. With the policy assignment itself it didn't even appear as a non-compliant resource. I went through the checks to make sure it was the same region, correct tag, correct rsv and policy, which all appeared to look fine. When remediating it still wasn't pulling the resource through.

When I went into the definition detail to see what could be amiss, I noticed the list of WindowServer image SKU's that were listed (image attached here https://i.stack.imgur.com/1YPpM.png. As I was sanity checking everything, I looked at the VM to see that the SKU wasn't actually in this list (2019-datacenter-smalldisk-g2).

As every SKU is listed specifically it makes me think this image has just been missed off and needs adding? Rather than it getting captured by one of the SKU's listed.

I can add the VM manually to the existing RSV for now but for future ref, is there a way I can raise this if my findings are indeed correct?