XR15 Won't Select Menu Items on New Samsung Q70 TV

The Comcast XR15 remote will not select items on my new Samsung Q70 TV menu?  I have Disney +, but have to get out my Samsung remote to select it.  What pairing code can I use for the XR15 to navigate & select from the Samsung menue?  It works everything else fine with the 12015 code.  I'd like the XR15 to be the true universal remote for my very simple system- TV + X1 box.  Thanks for guidance on this.