Fenix 5X and Sram AXS

I have mounted the sram eagle XX1 AXS on my bike.

I want to synchronize it with the Garmin and I see that it only gives me the option of 11 speeds!, but curiously then on the data screen I see 12 speeds Rolling eyes

The fact is that it is impossible to assign values to the 12 speed

Someone else with the same problem? Any solution?

P.D.- I was able to do it without problem in the edge 1030