I shoot also mostly with available light, and when the sun has set in the light of dim headlamps. So being able to push and pull shadows and highlights is extremely important. In that regard GH7 is no slouch, but it is not quite the same than Z6iii, ZR nor even S5ii was either.
If you have a good HDR capable display (and I don’t mean your tiny phones, laptop or medium sized displays, but a 65” or bigger OLED with infinite contrast, or a JVC projector with good contrast and inky blacks) one must be a wooden eye to not notice the difference between SDR and HDR masters.
At least with my grading skills the 6 stops of DR in SDR look always worse than what I can get from HDR.