I built an integration for the fan with an ESP32 Dev board and a CC1101 radio. It mimics the remote RF signal to control the fan.
All the details are here: GitHub - jawtech123/Home-assistant-AC-Infinity-ESP32-CC1101-: Control an AC Infinity 433MHz fan from Home Assistant using an ESP32 + CC1101 — reverse-engineered protocol, no custom component, no YAML. · GitHub
Cheers