ESP32-WROOM32 and ESP32-WROVER is certified module from Espressif. It can be installed and sell in some countries.
Below is ESP32-WROOM32.
And some development kits are on sales. Below is ESP32-DevKitC from Espressif.
The difference between ESP32-WROOM32 and ESP32-WROVER is memory size.
How to use with obniz
Install obnizOS for ESP32 and write a DeviceKey you generate to your ESP32-WROOM32 or WROVER. Then you can control its IOs from the internet.
See obnizOS quick start.