One misconception that everyone keeps repeating is that the pi 5 expects and needs a 5v/5a power supply to work. The CPU and all the IO will work as expected with any USB pd charger that can do at least 15 watts. The only issue you will have is a power limit on USB peripherals that use a lot of power like hard drives. Keyboards, mice and webcams will work just fine with the 600 milliamp power limit.

Previous raspberry pis had low usb power limits and people did not consider those products dead on arrival. Now that they are trying to address a limitation in the original product people are discovering that the raspberry pi was always a very limited platform to begin and the next step is not an incremental bump to the specs but to just buy a regular computer.