Most laptops have BIOS settings that allow users to manage power-on features. You can access the BIOS by pressing a key during startup, often F2, Del, or Esc. Once inside the BIOS, look for options like Power Management or AC Recovery. These options may include Wake on LAN or settings enabling the laptop to power on automatically when connected to a charger.

I was lucky and the option is already enabled on my mini PC. If I remove power and then turn it back on (like with an external switch), the mini PC boots up automatically.