@Michael Little Apologies for the delay in response and all the inconvenience caused because of the issue.
First it seems like the machine failed at domain joined which is why the machines seems to be in unavailable state.
Second, you haven't register Application Group to AVD workspace which is why it is not showing any application under RDWEB.
Can you please follow the below mentioned link from scratch:-
If you still face any issues, there is a possibility that you might have missed the following components to be configured:-
- DNS configuration under VNet
- Not sure whether DC is reachable or not Please check the following as well and see if the deployment goes well or not:-
Go to Azure Portal -> Resource Group (Under which you deployed the AVD) ->Deployments
Check if there is any deployment and confirm whether it was failed or not.Also, when you deploy AVD, it won't require Public IP address and port 3389 will be blocked, so for admin purpose you need to add a public IP address to the machine and allow port 3389 from the NSG which got applied to the VM's NIC.
Hope it helps!!!
Please "Accept as Answer" if it helped so it can help others in community looking for help on similar topics.