i would like to use the following JR RC system on Cube Orange+ but they have mentioned its protocol as XBUS.
Cube Orange+ has support for Sbus.
RC Transmitter T6 X4:
Rc Receiver RG612 BX:
I dont think i have ever seen support for Xbus, you will want a radio with more than 6 channels, it takes 4 to fly, 1 for modes leaving one spare.
Why? Did you get it for free? For what type of craft?