I can confirm this version works. Simply flash zip, reboot and install apk after. Though safety net doesn't pass...Magisk files from Octavi OS telegram Channel
Flash ZIP -> Boot System and uninstall the magisk Manager -> Install attached magiskR.apk
Thats all working for me.
Also to be able to install OctaviOS you need to install the specific 3.3 Offain TWRP version from the general rom installation guide. That was a headache (who knew newer version of magisk didn't work?...).