You don’t see that because it just isn’t supported by what people make. No laptops are going to provide PD power outputs at relevant voltages because they would need to have a huge amount of switching circuitry for a situation that is not strongly user demanded. Spotty support means products are never built to expect it to exist, and we continue with all the problems of USBC being borderline unusable for what you would expect to be simple tasks. PD is a bag of hurt at the best of times unfortunately.