Reset bugs in my handset

You mean you cannot see changing icon size and app drawer feature? These features are supported on recent version of System Launcher. It seems like System Laucher downgraded to old version while you reset. You may update system launcher. But it seems like the release has stopped. It may release again later. If you cannot wait you can download apk from one of below links.
Latest Alpha Verison - https://www.apkmirror.com/apk/xi ... droid-apk-download/
Latest Release Version - https://www.apkmirror.com/apk/xi ... droid-apk-download/