It’s a proprietary 2.4 GHz communication for the remote, as far as I can tell. At least there is no AP / WiFi mode.
The Chinese App is called “Lamp Smart Pro” and seems to use BLE.
I stumbled across this HomeAssistant post which also deals with a lamp using this app and which was successfully reverse engineered.
My first hope was that I could use that with ESPHOME on ESP32, but unfortunately the lamp does not pair.