Selected Answer
Albert
I think Excel 2019 is the same as my 356... In an unprotected sheet, go to Review on the ribbon and look in the Protect subsection- there should be a button "Allow Edit Ranges" (to the right of "Protect Workbook"). Click that and you'll see a requestor "Allow Users to edit Ranges".
If you don't see that button, right click the ribbon and choose "Customize the Ribbon..." and see if "Allow Edit Ranges" is unchecked.
From your file (now in the question), I see you've accessed that button and have a requestor showing no users with permissions for the range Store1. If you want to make the sheet protected by a password for all users, follow the other steps in the tutorial.
If you want to allow some users to access without (or with) a password, follow the screenshots in the attached file where I've searched locally for a (known) user called "john" (me!). Start of arrows indicate the buttons to click or tect inoput/output. In a corporate setting, you could have lots of netwrok users but I'm not working anymore so can't illustrate that.
Hope this covers what you were trying to do.