Make sure you’re using the correct cmd:
Right click Start>Powershell with admin rights & enter:
Get-AppxPackage -allusers | foreach {Add-AppxPackage -register "$($_.InstallLocation)\appxmanifest.xml" -DisableDevelopmentMode}
Try Solution 9: Use the Preinstalled Apps Zip to Reinstall Microsoft Store:
You may not find Windows Store in Windows 10 if you are using an outdated/obsolete version of Windows on your system. Moreover, the user encounters the
appuals.com
If that doesn’t work then try the suggestion here:
Microsoft originally announced Windows 11’s new app store in June, and since then, the company has been trying to improve the quality of its marketplace. Several servicing updates have been released as part of the Windows Insider Program and users have been testing the new Store on their devices...
www.windowslatest.com
Try an in-place repair:
In a nutshell you just download the media creation tool, run this by double clicking on the file & choose to upgrade/install now or if you are creating media on another PC, you download the tool, run it by double clicking on the file & choose to create media for another PC, then insert the Windows 10 media (USB/DVD) in the problem PC & run setup from within Windows.
You can also download the Windows .iso, right click to mount it & then double click the setup.exe file to run it.
Follow the instructions & ensure keep everything/keep apps & files is automatically selected. If not then please do not proceed otherwise you’ll lose everything.