@Alex-Kushleyev I figured it why the orientation estimator wasn't running after reading through this post, where that user had the same (plus a few more) problems: https://forum.modalai.com/topic/1755/setup-problems-on-new-boards-sensors-and-qgc-connection-problems/18
Basically the problem is that the firmware as-shipped assumes you have at least one active mag, but that the built-in one isn't active. The documentation didn't say how to change the PX4 parameters to make it work without one. The default build does not start the built-in mag, so if you don't have an external plugged in (as in my use case), then EKF2 gets stuck while looking for the reading for one without any error printout, making it unclear what the problem is. I initially tried the version of activating it by adding the boot line to the etc folder of the sd card, and that worked once, but then it got deleted on the next reboot for unknown reasons. That is an easy enough fix with just a firmware rebuild where the magnetometer is started by default. That really is the version you should ship unless you are going to specify in your documentation that the as-shipped version will need an external mag to function. With the firmware as-is, you have to change two parameters on PX4 to make it work, specifically you have to turn off EKF2 magnetometer fusion and whether or not the system has a mag at all. Ie. EKF2_MAG_TYPE to NONE and SYS_HAS_MAG to Disabled. After doing that it will run.
Still haven't sorted out the issue with the telem lockout. I'll see if that got fixed with EKF2 now running normally.