Questions about Canon Bg-E21

Unfortunately not, it is only for the EOS 6D Mark II.

No, unfortunately it doesn't fit. For the EOS R you need the BG-E22 (other dimensions and other connections). Canon Battery Grip BG-E22 (Battery Grip)

Hello Donni Yes, you can screw the camera incl. battery grip onto a standard tripod without any problems. Works without problems :)

No, no batteries are supplied. Only the battery grip

Hello, with Canon, practically every DSLR camera is just so different in dimensions that it can't be done. Product policy, unfortunately. We can be glad that the batteries still fit....