Apple does not automatically offer older versions via the App Store to casual users. Instead, you must manually download the installer from Apple’s official portal.
You must sign in with a valid Apple ID to access the developer archive, though a paid membership is not required for this download. How to Download Xcode want install on high Sierra 10.13.6 - Apple Developer download xcode for mac os high sierra 10136 work
: In the search bar, type "Xcode 10.1" to find the installer package. Apple does not automatically offer older versions via