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?

You'll need a 10 bit format, like ProRes or DNxHD.

It's up to you/your client what format to use for delivery. It's not directly related to the source format (you can have 10 different source formats). Don't try to match your source format, as this is not necessairly what you want/need.

What you want to do with your exported footage? Send to youtube, someone as final master etc?