Do you happen to have a few more details? We know that RF lenses cannot be adapted backwards, but EF lenses can be adapted to fit and function of RF mount cameras.
EL - To my knowledge, the L indicates the usage of Lithium batteries. Canon has finally picked up what other manufacturers (Godox etc) have used already for years.
I wouldn't spend time on KRW, unless it's for amusement ... Godox and other brands offer proper support for Canon cameras and have nice wireless trigger solutions. If it's for more than the experimental snaps in the backyard I would skip Chinese knock off stuff and CarouHell.
Coming back to the initial question, KRW states:
So yeah, this is what Canon users expect.