hey!
You should be able to connect it to a dataset of your choice.
When you click on your dropdown you should have this option:
https://support.wix.com/en/article/about-connecting-page-elements-to-database-content
If you do not have it - please contact us through opening a ticket so we can take a look at your Editor:
https://support.wix.com/en/article/contacting-wix-support