You made the right choice to match the axs chain with the xplr cassette. I tried a shimano xt 12 speed chain with my force axs 10-36 and 10-33 cassettes. It didn't work terribly with the 10-33, but the wider chain had hesitant shifting in the 13-14-15 area that micro-adjust couldn't fix. My 10-36 setup uses a 33T RD and works fine with an axs chain, but poorly with the xt chain. FWIW, an axs chain works great with a Campy 12 cassette.
As long as the shifter works properly with the RD, you should be good.