I don't mean like two stage, but I mean 15-100% adjustable capacity.
Some cars use variable displacement compressor.
The displacement is controlled by moving the swash plate. The angle of swash plate determines the piston stroke and offers capacity variation down to about 15%.
In older designs, the adjustment target was to set the suction to a target pressure. As the compressor output increases (with the engine RPM increasing) compressor will cut back to reduce capacity.
If you're at idle, it will also adjust compressor in response to evaporator motor speed as that affects the evaporator load.
Some newer designs use an electronic valve which also monitors thermostat setting. So, if the cabin temperature is close to adjusted value, it can actually increase the evaporator temperature by throttling enough to cause evaporator pressure to go up.
The point of that is, rather than making air that is too cold and uncomfortable out the vent and reheating, it makes the air not as cold.
MVAC variable compressors are usually 5 cylinder axial type with pistons arranged in pentagon shape.
Why can't the same setup be used for stationary A/C?