Catch 22
Opps Larry, yep that's an issue. ..or... maybe not.... Does Frankenbike bother you?
If not; then you could cheat for now. The Derailleur doesn't control the travel increments aka the indexing, the shifter does. SRAM shifters are all Linear cable pulls that is why you can interchange them. I'm 90% certain the 22's are still linear pull. If anyone knows otherwise please correct me..... There's enough max and min adjust in any Derailleur to go that full width of the cassette; so it should works just fine; if I'm correct about the linear pull on the brifters.
So if you put a WiFLi 11-32 cassette on it's geared 11,12,13,14,15,17,19,22,25,28,32. With a front 34 or 36 that is a pretty darn wide gear range. You can also swap the 15T sprocket for a 16T. I think is wise for most mortal people to have 16,17 in there. 15,17 is a 83-96 rpm jump. The 14,16,17 tends to give nice clean 80, 88, 96 rpm jumps; that much more linear, never understood them keeping the 15 over the 16.... but I'm no engineer....
Now Granted you can't yet run the 36 ones because 22 gear ones don't ....... oh what you can cheat again You probably could take the BASE sprocket from a mountain cassette and combine it with the rest of the road sprockets. It's definitely Frankenbike but it should fit if you leave off the spacer by the spokes and add a plastic over-shift guard on the spoke side. I wouldd wager the shift step between the road and mountain sprockets might be noisy since the teeth wouldn't be aligned exactly; but it'll still shift through it just fine; bikes did not always have these computer shaped teeth and we still shifted them just fine.