Yes, the ASUS X-570 Pro includes a power supply unit.
Yes, the ASUS X-570 Pro includes a power supply unit.
For your new PC, you chose a white and grey theme. The compatibility check on PcParPicker warns that your motherboard has a special 4-pin ATX power connector, but the power supply you're considering doesn't have it. This connector is needed for extra 12V power, which might be important if you plan to overclock heavily or use powerful graphics cards.
because it's designed in modules, it makes sense to purchase the cable for that.
Keep your funds safe. The extra 4 pin cable isn't necessary. Advice from Supakomputa may not be ideal since EVGA offers many options; ensure you use the right PSU for your PSU to avoid damage. In any scenario, you're safe—just double-check. Consider a more suitable PSU if you haven't already purchased it.