The A23 is a not a good tubeless rim, in my opinion.
The A23 rims I built last Winter for my 650B conversion were supposed to be tubeless ready, but I think the design is weak in that there is no raised lip on the edge of the bead shelf to keep the tire seated. I tried to setup a pair of tubeless compatible Panaracer Gravelkings and they wouldn't stay seated if the pressure dropped below 10 psi or so - they'd drop off the bead shelf into the rim valley. So, I just didn't trust them to be run tubeless, and went back to tubes for these wheels.