Just a quick update, porting this to MZ is almost complete. Should be ready tonight or tomorrow assuming I don't encounter any hiccups. So far it seems like I've got everything working, just need to do a little more testing.
Thank you!
Hello this plugin has been ported over to RPG Maker MZ now!
https://notritter.itch.io/ritter-active-item-system-rpg-maker-mz
Thank you!