In a recent article in Elektor magazine, [Clemens Valens] describes the construction and software for an ESP32 walkie-talkie system that uses ESP-NOW for the wireless connection between units, alon… ...

Open up the schematic for what is in the ESP32 MODULE. There’s more than the IC in there. Decoupling caps are always a good idea since you are dealing with a radio that will have peak transmissions.