C4 at 200nits and lower is approximately 94% dcip3, if you run it at native gamut, where it looks its most saturated.
You can tell visually, just look at reds, if it looks "very red" it's native. If it looks pinkish-or brownish, it's in a clamped mode, srgb like mode.
Srgb is the default internet standard, but it doesn't mean anything, if no one has a display matching those standards these days.
So, when you edit your photos, you set photoshop for example to srgb, but what you see on screen is what you see on screen. Srgb is just the container's assumption. The device takes over from whatever the signal output is.
Most devices out in the wild now are Near P3 gamut, which is what the native output of the C4 will be.
If you edit your photos in a clamped srgb mode, it will look over-saturated when stretched to P3.
In reverse, if you edit in P3, and someone is viewing your photos on a monitor closer to srgb, it will look Under-saturated.
So it comes down to 2 things. What are you trying to capture, and what is your intended target device.
Generally, the pros will use raw capture, then use a lut of some sort in the photo app for output and adjust for target device after the fact.
To keep it simple, make sure your LG is in its native gamut mode, check for saturation clipping using a pattern on your browser, and reduce the saturation setting on the LG until the clipping is gone.
Then when you edit the photo, check your work on a new lcd monitor, an old lcd monitor, finally an iphone. That pretty much covers your audience.