The R+ has 11 speed. As far as I know, the Sunrace is only 10 speed ?

I mentioned the SRAM XD or XDR because the rest of the transmission is SRAM.

Shimano microspline also allow 10 teeth but its mountain bile only with only huge mountain bike cassettes while XDR is road and SRAM has a 12s 10-33 cassette.

Note that there are cassettes with 9 teeth also for XD and XDR with two 9-32 cassette models from 3T. I have one of these cassettes on my Birdy and it work fine with the factory installed Shimano 105 rear derailleur.