Allow non-admins to install apps from Company Portal

Have you tried your own pre-made intune apps? I've created over 50 and installed software with Intune on over 1,000 computers across thousands of more users of all levels of access, and we never had an issue with a single UAC prompt. Perhaps the "Microsoft Remote Help" is meant for admins, or if someone made that app for you they didn't set it up correctly, correctly like using PSADT (PowerShell App Deploy Toolkit) which handles noninteractive, silent, system and limited users with grace, and/or the correct backend settings for Intune (you can choose to run them as SYSTEM or user context, and it sounds like the app is maybe running in user instead of SYSTEM in your case as SYSTEM is above administrator).

Posting as it may help someone who stumbles across this as I did.