OK, I’d be willing to bet this is NOT ARRI Alexa/Amira/Mini Log-C footage. Especially not from a drone, unless it were a very big one. Note that the inspector says AVC encoder. ARRI footage is either ARRIRAW or ProRes.
This is likely DJI set to a flat profile. Adding an Alexa LogC LUT would be the wrong thing to do because the color science is different. Did you try one of the DJI custom LUTs that you have listed in the pulldown? That might actually be the right match.
You can either get the right LUT to match the specific camera model and apply it manually, or simply grade the shot with FCPX’s color correction tools. I would recommend the latter approach.
– Oliver
Oliver Peters – oliverpeters.com