Python 3 support is completed and it is in a separate development branch:
https://github.com/AaronLionsheep/Shell ... ee/develop. My intention was to include it in the 1.0 release and get the plugin in the plugin store. However, I wanted to get the optional device components feature implemented and added in the first release. Indigo 2022.2 continued the Python 2 support, so that slightly reduced my push to get that version completed.
If you are interested, the changes included in the development branch can be found here:
https://github.com/AaronLionsheep/ShellyNGMQTT/pull/37