Appletv 4k home sharing app do not read 4k video (H.265/HEVC) from mac

1. Home Sharing and the Computers app may have different capabilities than other apps. ‘Not supported’ is different from a bug. It might be without priority to them, or might be deliberate for other reasons.
2. If Apple Home Sharing lacks capabilities that you find important, then have a look at third party solutions like Plex, Infuse, etc.
3. Apple doesn’t generally share with the public on what they are working on at the moment.
4. If you have a feature request or want to submit a bug report, then please use the feedback form, to reach the appropriate team directly: Feedback - Apple TV - Apple.

My test files of 4K H.265 HDR do play through Home Sharing for me.

I don’t have a Dolby Vision TV to test that format at this time, but the DV file from iPhone recording seems backwards compatible for playback.

Maybe your file has some properties that are different than Home Sharing expects (e.g. hvc1 vs. hev1 codec id)? Is the file accepted in the TV App Library on Mac, with a visual preview image?

If you need to change hev1 to hvc1, then you can do so with e.g. ffmpeg in Terminal:

ffmpeg -i input-hev1.mp4 -c:v copy -tag:v hvc1 -c:a copy output-hvc1.mp4

(Replace input and output with your actual names, including their path. Drag-and-drop can help with that.)