Layered Maps NOT using ArcGIS

Hi

A while back, I built a map report in SSRS for a client, that shows UK counties shaded by overall count and layered over that, bubbles for the Top 25 individual values, see below.

We are migrating our SSRS reporting over to Power BI but because this map contains geospatial datatypes, it will not migrate over to a paginated report. Therefore, I need to recreate using standard Power BI maps but not using ArcGIS. Is this going to be possible in Power BI using standard functionality. I have built a shape map for the counties and a seperate map for the bubbles, but I need to combine the two. I also need to shade the bubbles as above with gradient colours rather than a single colour.

Thanks in advance