A&H utilizes the same communication that the Wireless Workbench uses. If a system doesn’t work in Wireless Workbench, then it isn’t going to work in the A&H universe.
If you can convince Shure to get the SLX-D series working inside of Wireless Workbench, then it would work inside of the A&H universe. Probably without a firmware update if they change the SLX-D protocol to match the QXL protocol. If they change the Wireless Workbench side of things to make it work, I would assume A&H would also have to update their firmware for it to work.