I moved this to its own thread in #help.
@alex_m I suspect this is a problem with your setup, not within Obsidian. Could you please share the following?
- The output of
xdg-mime query default x-scheme-handler/zotero - The output of
xdg-settings get default-url-scheme-handler zotero - In which section does Zotero appear in your
~/.config/mimeapp.list - A GIF trying to open the note with the link