If you can find a USB hub with buttons like the RSH-516-4 then the chances are that the buttons drive transistors/mosfets to control VBUS. If the hub chip inside exposes all of the PPPS control ...
This meant I could connect my cordless mouse USB dongle, smartphone and an external monitor via 4K HDMI port. There is also a small light on the Satechi Slim Type-C Multi-Port Adapter V2 that is ...