Following the tutorial my app doesn't seem to show up on the app pannel.

I’m following this tutorial part, I’ve selected react,  I made my app and tried both localhost and an external server, but my App isn’t showing up on the left side pannel for apps or the upper right one, I had an old app I made from html and jQuery, which does show up on the upper right, but I just can’t find the new app I made, I’ve looked at other ones that add an event listener to one of the Miro events but it did not help, is there anyway to trouble shoot because I can’t find much to look where its going wrong.