So, your camera is your camera. GH5 shouldn't be Ursa Mini 4.6K shouldn't be an Alexa shouldn't be Film. The camera is what it is, trying to get it to look like another camera is defeatist, embrace the tool that you own or of course purchase the one that you really like.
The LUT is designed to dig out what's hiding beneath odd color choices by Panasonic, and is meant to be a stable base upon which you build. The skin looks like that because that's exactly what Panasonic gave you, and doing anything more to it looks over modulated. Or, when you push flesh values too hard from source im