Using a table for Azure Map's Reference Layer

We really want to use the Azure Maps visual with a filled map layer using zip codes, then a reference layer on top with location points. However, we want certain location points in the reference layer to be visible depending on how the data is filtered.

Since the reference layer can only be a file, we can't use table connections to filter that data. It'd be awesome if we could use our locations table as a reference layer.

Another way to plot additional points over a filled map would be great too, not necessarily just the reference layer.