Stream Disney Plus via Fire Stick on Xfinity

I am aware that i can stream the Disney Plus app via my fire stick but i can't figure out how to use my fire stick on my tv.  I have xfinity and use the xfinity remote.  How do i switch to use the fire stick in order to watch disney plus.

Xfinity- seriously....just make amends and allow disney plus on xfinity!  This is ridiculous!