Please feel free to take the below knowledge base article as a reference:
I kindly request that we add to the article information about the "Refresh Counts" function (I added screenshot).
"Refresh Counts" can be found under CONTENT in the Staging publication window.
I would add the following to the documentation:
The purpose of the "Refresh Counts" button is to render the data for CONTENT section. It will show each of the options ("All", "From Last publish Date", "Date Range" and "Last") content that can be published. The user will need to make their selection first and then click the "Refresh Counts" button.
Please tell me if you have any questions.
Many thanks for the help,