Hi,
I just wanted to thank @xUser5000 for this great plugin and to share my method to use it with Zotero. I am only interested in the feature of creating reference lists for now.
I use the Zotero plugin Better Bibtex. I have seen it mentioned in another post but I don't think that it was exactly for the same goal. Sorry if it is redundant.
I have exported my Zotero library in the better bibtex format (not bibtex) and made sure to check the "keep updated" box. I then copied the link to this export in the BibTex plugin of Joplin and that's it. The library is kept up to date. There are some bugs (e.g. the year is correctly reported in the citation and reference list but not in the search box) but nothing major so far.
Hopes this helps.