my ac was not blowing cold air. I brought to shop and replaced expansion valve and dryer. It now blows cold but seems not cold enough. Could the compressor need to be replaced?

maybe they replaced wrong parts, and it just needed a charge? maybe still leaking? maybe the diverter door is letting too much hot air through? try bypassing heater core as a test for the diverter although if it's stuck in the 'not fully cold' position it still will be warmer