I'm sorry the Zutilo add-on is not available (yet?) for Zotero 8 because I use it e.g. to copy tags between items. Will this become available in the near future?
The Zotero version 8-compatible version has been officially released. That version is no longer compatible with Zotero v7 (it won't install). https://github.com/wshanks/Zutilo/releases
Upgrade Storage
https://github.com/wshanks/Zutilo/releases