I exchanged email with the developer, asking about F87 M2 compatibility and whether he recommends the older Vgate iCar 2 (Wi-Fi) or the newer iCar 3 (Wi-Fi or Bluetooth). He was prompt and communicates well in English:
"The M2 is supported since basically it is just normal F22 ;-) I would recommend the iCar 2, since it has an switch to put it on after it went into sleep mode. The iCar 3 does not have this button and has to be unplugged and plugged back in to be switched on again."
Ordered the iCar 2 and will try it tomorrow. If it works as advertised, this will probably start putting a few hobby coders out of business. If it doesn't, well... YOLO