As far as i know the only services showing under MyOSMC/Services are services installed by Appstore. And such your “selfmade” service isn’t listed there. I do agree that it would be a good thing to be able to start and stop some services from GUI, but where should we draw the line. If you stop the wrong service you could create a unstable system.
This might something for @sam_nazarko to look at when he gets some spare time