I used WLED to make an RGB LED effect-laden scarf for my wife, and then decided to add the same setup to a Santa hat. Now, as long as one ESP32 can access the other (either over the built-in access point or any shared WiFi network) the effects she chooses on her scarf sync to the brim of my Santa hat :)
If the ESP32 chips will always be close to each other, you can use ESP-NOW to have them talk to each other without the need for an access point or wifi network.
I love WLED so hard.