content Airplay 4k

Hello
I have 4k movie on my ipad pro
When i make airplay to my (apple tv 4k)
Just audio movie airplay to my apple tv not movie
I don’t have any problems with 1080p 720p movie it’s work …but 4k movie I can’t
I have infuse 6 last update
My apple tv and ipad last update also

I don’t think apple supports hevc while airplaying, except if it is in the photos app.