What delivery setting for 4K/MP4/10-bit footages?

What delivery setting for 4K/MP4/10-bit footages (from Lumix GH5)?
For more information on the footages, see MediaInfo. After some attempts, I'm desperate. I have tried it with MP4, is normal my export format, and others. Out comes only 8-bit.
What am I doing wrong? Or is there a problem with Resolve Studio 15 beta-2?
For more information on the footages, see MediaInfo. After some attempts, I'm desperate. I have tried it with MP4, is normal my export format, and others. Out comes only 8-bit.
What am I doing wrong? Or is there a problem with Resolve Studio 15 beta-2?