Disable HDMI/GPU on Orange Pi Zero 2+ H5?

[Lee Fromage]

In this post tkaiser says disabling HDMI and the GPU on H3 boards can reduce power consumption by 200mW. Is it possible to do this on a headless Orange Pi Zero 2+ H5? I don't believe I can use h3consumption or edit FEX files because I'm on the H5 mainline kernel. I tried setting monitor=none in armbianEnv.txt, but I didn't notice any appreciable difference using an inline USB power meter.