If you're on Oreo ROM, you will need this add-on developed by @yochananmarqos: https://forum.xda-developers.com/app...elist-t3670646
This module requires installation from Magisk Manager, not recovery.
This module might lead to your device stuck on logo or booting to recovery, I gather it might be a kernel issue -- the closer you're to stock firmware/kernel the more likely it is to work. If it fails, try the "Terminal App Systemizer" instead.
NOW IN OFFICIAL MAGISK REPO!
11.0.6: This is the last "classic/simple" version I could get from github, (11.0.6) which might fail on the larger APKs but doesn't include magisk partition resizing code which might cause problems. It also does NOT include a companion app.
12.0.5: This is the latest "stable" version with the companion app. Based on pre-"magisk 13" template (version 3), but seems to work with magisk 13.
14.0.0: This is the 12.0.5 version migrated to 1400 template (released with magisk 14). Not tested by me, so use at your own risk (but please post back wherever it does/does not work).
The source code (with history) is available here if anyone wants to continue development: https://github.com/stangri/AppSystemizer