New wheels don’t need to ping and don’t need to go out of true if they’re built properly.
I had a rim recently that seemed to suffer compression with tubeless but it didn’t go out of true, I just felt the spokes were under tensioned. Compensated for the compression with a bit more tension and its been cock on since.
I grease nipples rather than use any sort of locking compound. Nipples hold by spoke tension, not glue.
The problem is, everyone who knows someone who builds wheels says they’re a fantastic wheelbuilder. Lots of them are just average. One of the reasons I do all my own is because one of these local stars built some wheels that varied from 17 to 23 on the rear drive side using a park tension meter. Wheel building isn’t difficult but there are things that need to be considered. It sounds like on the OPs wheels they haven’t considered all of them.