Did Oracle remove the Java System Preference in macOS?
It looks like the Java Control Panel was removed in Java 11.


  Please note that the Java Control Panel, which was used for configuring the deployment technologies, has also been removed along with the shared system JRE (but not the server JRE) and the JRE Auto Update mechanism


JDK 11 Release Notes

Check out the answer karma4917 provided on Stack Overflow:
MacOS Java Control Panel Missing on Mojave