Depending on the project, but either find a nearby USB port (I have home temperature sensors powered off the back of my TV, and other projects off USB ports aro

Depending on the project, but either find a nearby USB port (I have home temperature sensors powered off the back of my TV, and other projects off USB ports around the house) or use battery power. Batteries can last months on ESP32s if you set them up right. They have great deep-sleep modes and can use practically nothing unless they're actively needed.