@Tomas-Holcek Noone here will be able to share if there are plans regarding this limitation.
Your other question is easy to answer though:
Race and Race S have the same 2 S+ limitation like Vertical and other models.
I’d suggest the ball is entirely in FF’s court on this. If they update the firmware on the belt to include the RR data in the bluetooth stream then it will start working with ZoneSense.
If the data isn’t there then Suunto can’t do anything.