It is possible to submit a short test to ACX. This will prove your production pipeline without cold-submitting bushels of sound files and weeks of work.
https://forum.audacityteam.org/t/how-to-send-a-test-to-acx/49588/1
We should note that ACX has two test levels. There is the automated robot which, in general, tests for the same things that ACX Check does, but then they have Human Quality Control. That’s a human who tests for theater. Are you pleasant to listen to, do you stutter or do you like to spit on the microphone? Did you overprocess your poor work to force it to pass? That’s a common failure.
If you do fail, they will generally explain why and maybe one or two other comments. They won’t troubleshoot your studio and they won’t engage with you.
Koz