Hi,
Since you have already tried resetting the app and running wsreset.exe, let’s move on to the next effective steps to fix the missing search bar in Microsoft Store.
1. First, try signing out of your Microsoft account in the Microsoft Store, then sign back in. This can refresh the app and often restores missing UI elements like the search bar.
2. If the issue persists, try uninstalling and reinstalling the Windows Store.
Press Windows Key + X and choose Windows PowerShell (Admin). Copy and paste the command below and hit Enter.
Get-AppxPackage -Name "Microsoft.WindowsStore" | Remove-AppxPackage
Note: Please complete the process before proceeding.
After that, reinstall the Windows Store. Press Windows Key + X and choose Windows PowerShell (Admin). Copy and paste the command below, then hit Enter.
Get-AppxPackage -allusers Microsoft.WindowsStore | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Wait 2 minutes, then reboot your computer and try again.
3. If that fails, the next step is to try System Recovery without deleting your files and apps.
Click the Start menu > Settings > System > Recovery.
Choose Reinstall Now under the section labeled 'Fix problems using Windows Update.'
Once completed, your system will restart. Please check afterward.