Sharing with External Users from Finder Extension on macOS

I am new to NextCloud and am working through the different features, etc.

From the NextCloud web UI I can easily share a file/folder with an external user who isn’t part of our domain. But, in macOS’ Finder, I can right-click on a file and am unable to share with an external user. If I type in an external email address, it simply says ‘No results for <>’.

By default, that field says ‘Share with users or groups…’ so I am guessing that sending to external users isn’t allowed/supported here. Is my understanding correct? I have to think there is a way since I can do it from the web interface.

Many thanks in advance.

A friendly bump!