If My Apps does not appear when you go to Add a SmartApp, verify the following:
Make sure the Konnected SmartApp is Published. When you go to My SmartApps in the SmartThings IDE look in the Status column for Published.
Make sure you’ve installed the SmartApp GitHub integration on your local SmartThings server. The URL when you got to My SmartApps should start with something like
graph-na02-useast1. If the first part of the URL is only
graph, then go back to My Locations and click on your location to link to the correct server. Then you will have to install the SmartApp and Device Handlers again on this SmartThings server.