overlay fixed logo position in player window would be controlled by the player displaying the video, premiere is not a 360 video player so not something that could be done in premiere or or other editors like Nuke or AE etc, none of those apps are for building a 360 video interactive web display
if you want to create such a 360 video player with fixed logo in corner or other overlay graphics, you would need to use something like krpano or forge js
https://krpano.com
https://forgejs.org
thanks
sam