Hey,

Another user helped me out by sending me a Sureflap.

You can still integrate this into homeassistant - just need to buy in a particular esp unit and contact Peter on the homeassistant forums (see thread) for the firmware.

We're all set up now:

The OnlyCat flap looks very nice, but the price is insane & the online requirement is a deal-breaker. Even the non-sub option requires activation online afaik, so that's just no.