Couple of comments / questions:
Had issues uploading an Linux ISO image to Win Svr 2019 through WAC. Installed the updated extension to see if that fixed this issue. Still unable to upload a file, even when logged in as Administrator. We ended up using RDP session to upload to the server via desktop experience. It appears we will not be able to do this if we install Server Core or HCI Clusters which do not have a Desktop for RDP to connect.
Creating VMs if we move the VHDx files has not posed a problem. If we try to create a new VM through WAC, we can start the machine and access the Hyper-V Manager via RDP in WAC. The resolution is fixed and the remote display size is inadequate to display the entire screen for an Ubuntu installation. We would have to RDP through a Win10 machine directly to the Server 2019 box. If were installing into Server Core with no desktop or RDP services, it would be helpful to have a remote keyboard/video/mouse utility to access a new VM with a guest OS install, like a BMC management connection.