Did you select all the files and right-click to "extract," or did you right-click and then select 7-Zip from the right-click menu (or in Windows 11, click "Show more options" and then 7-Zip) and then "Extract files"? 7-Zip will only be used if you select it from the right-click menu. If that sounds too complex, I'll attach a PDF where I show it with pictures.