Should have done this earlier but I now checked the logs, seems like the name is given by media Router, looks something like:
MediaRouter: Selecting route: RouteInfo{name=Pixel Buds, descriptionBluetooth-Audio, statusnull, categoryRouteCategory{ nameSystem typesROUTE_TYPE_LIVE_AUDIO ROUTE_TYPE_LIVE_VIDEO groupablefalse }, supportedTypesROUTE_TYPE_LIVE_AUDIO , presentationDisplaynull }
So no MAC leak? Checked the update feed and
it seems like every minimum API level is already the current android versions... So no idea what else it could be