The Midea model you linked does not supply heat, but this Midea model does seem to have a heat pump that can supply heat: https://www.amazon.com/Midea-Cooling-

The Midea model you linked does not supply heat, but this Midea model does seem to have a heat pump that can supply heat: https://www.amazon.com/Midea-Cooling-Inverter-Window-Conditioner/dp/B0B3NJGSKL https://www.amazon.com/Midea-Cooling-Inverter-Window-Conditi... But the page also says: "NOTE: heat pump function will not work if outside temp is 41°F or below." The R-W-FLAME unit has about as many bad reviews as the one I linked. Maybe the reason for the lack of products/competition is as you say they "are made by the same 3 mega companies".