I did look into it. From what I can tell, WASAPI Loopback can only capture audio after all Audio Processing Objects are finished in the chain. I also looked into implementing my own APO with the intention to capture audio earlier in the chain, but there does not seem to be a mechanism to ensure MiniMeters would be before EQ APO.
For now, I will add a help page clarifying that EQ APO and MM are not generally compatible. I will also sit down and see if I can find any VST3 -> VST2 wrappers that are compatible.
However, do note that the MiniMetersServer Plug-In is open source (at the moment).