Champion Management Platform Install problem

I made sure to empty the recycle bin. I tried getting it up and running over the weekend. I could never get farther than the point where it should have been available in Teams to add, but it never actually showed up in the list of available apps. I could see it in the Teams admin center, and push it out to a team from there, but opening up that team to assign the app to a channel it was nowhere to be found.
The global admin was able to get it up and running with whatever magic he possesses. I'm still not sure what he could have done differently that I wasn't doing or able to do. He said he allowed it as a custom Teams app (which I thought I had tried), and the reason the icons were broken was because our admin accounts don't have licenses - though he did not elaborate on that.