I have Zotero sync’ed to Logseq and it is up and running, but I am unable to access Zotero settings. When I follow the Menu/Settings/Editor, there is no “Zotero settings” button. I was initially able to get to Zotero settings by clicking on the link that popped up to set up the API key.
On my devices (Ubuntu and iOS) the Zotero Settings button is located under Menu/Settings/Features.