Interesting find.

[kc9mne]

I was trying to flash a KHSUIN WiFi Smart 16w light bulb and it acts exactly like a tuya unit and gets the psk 02 message when trying to flash BUT on teardown its not an esp at all.
its a BK7231 http://www.bekencorp.com/en/goods/detail/cid/7.html
Which is apparently a knock off clone of an esp8266 with Bluetooth
https://hackaday.com/2021/04/17/replacing-an-esp8266-clone-with-the-real-thing/

I wonder if this could explain the strange compatibility as the chip is actually different.