Open Gate - HEVC - LOG: Is it possible?

If your device hardware allows, yes!

However, LOG is only available at the Open-LITE resolution due to hardware limitations. Full 4k open gate log is not available (except on iPhone 17 Pro with ProRes RAW, coming soon).

You have four options: Natural, Raw, Standard, and ProRaw. Natural and Raw both utilize Bayer Raw image data which is locked to only 12MP and can not utilize virtual focal lengths.

So if you find your self with those options missing or un-selectable, first: Check if you are in Photo Mode and what Process you are using.