Document management explanation

Question

I set up document management according to this page: https://docs.microsoft.com/en-us/power-platform/admin/set-up-dynamics-365-online-to-use-sharepoint-online

I selected which entity documents I would like to sync to SharePoint. Dynamics created the necessary document libraries, so I assume, I did everything correctly. I added notes to the form attached some files, but no files are uploaded to SharePoint.

Can somebody please tell me what might I missing?