I'm trying to get EHS ready for our deployment and all is fine with settings restrictions  and built-in apps, but my company's custom apps are not offered for user mode enabling in the admin login screen.

They were installed and executed once, then the unit was rebooted. Installed  EHS and rebooted. You can see the apps in the standard drawer (Accessory.. and Putaway in the screens below):

The EHS admin screen doesn't list them at all:

I'm still somewhat new to Android development and probably missed some resource or signing requirement, but can't find any such information in the EHS documentation, does anybody have an idea what would cause this?