Yes, it is possible. Mapbox GL does allow you to combine data sources and render them accordingly. However, as always, there is a catch. Someone has to look into how to do it and implement corresponding map source description. Every time similar issue has been raised, it has failed to bring new developer/concerned user on board to make it happen.

In general, Pure Maps base (Poor Maps) was written in a way allowing to make new plugins easily. So, it does not have to be me to do that.

My personal plan is first to fix collectd bugs/"features" exposed by my SFOS port to XZ2/XZ3/XZ2c, maybe update SystemDataScope internals a bit, fix public transport import for OSM Scout Server, rewrite navigation in Pure Maps. This sprinkled with discovered need-to-be-fixed bugs, possibly required small adjustments for XZ2compact in SFOS port, and something else not expected now, will keep me busy for some time.