Hi,
Go to Settings> Apps & notifications> Apps Manager> 3 Dot Menu> Show system ( Device for extra launcher)> Reset app preferences> reset Apps,
https://photos.app.goo.gl/N9DCA5CkkrQMXS2AA
System revert to default launcher> to change> go to App drawer> select Launcher> long touch> set as default,
Go to Settings> Apps & notifications> Apps Manager> Scroll Down to Google play store > Tap in 3 Dot Menu at top right > Force stop> Clear data >Uninstall updates,
Wait some time for the App updates Automatically.
Restart device,