The context menu action is just for showing a custom context menu, you can't change existing system context menus.
Instead I'd recommend to configure what you need in Apple's Shortcuts app, Shortcuts can be called from the "Quick Actions" context menu - sub menu in Finder
//edit 2024: this is now possible.
See
https://docs.folivora.ai/docs/6b_finder_context_menu.html
or this tutorial: