AIPI-Lite AI Robot
First, this thing is $17 on Amazon, so had to get one...
https://www.amazon.com/dp/B0FQNNVV36?
It is very small, maybe 1.5" by 2".
Second, this thing appears to be remarkably hackable, according to this:
https://www.robertlipe.com/449-2/
So, you could turn this in to a WiFi module for around the same price as actual ESP-32 real one.
This one also has microphone, speaker, case, and display. Plus an RGB LED.

Comments
What is most interesting is the back side...
It has places to solder a serial interface and power to:
Unfortunately, I don't know how to program ESP-32 devices, but I'm sure somebody is out there hacking it right now...
Or, maybe you don't need to hack? Maybe there is already code and/or firmware around to make it into a wifi module ++