alt Hacker NewsLooks good, but it'll probably take a while until it's anywhere close to the coverage of existing repositories:
https://templates.blakadder.com/ has almost 3,000 devices flashable onto Tasmota firmware.
For older Tuya devices there's https://github.com/tuya-cloudcutter/tuya-cloudcutter
OpenBeken https://github.com/openshwprojects/OpenBK7231T_App covers 800 of the newer generation Tuya devices.
And there's a large community adapting ESP32 devices onto https://esphome.io/
Oh, esphome is more than only esp32 these days. For one it always worked on the pre-esp32 ESPs. But yeah, RPI2040, nrf52 and a couple of other platforms work too.