This looks awesome, I would love if there was an android app for smart bulbs, outlets, etc. I hate having to install a new app for each brand.
I use Home Assistant for that. It ties everything together quite nicely.
Also, a lot of the generic devices are really Tuya devices and can be controlled using a single instance of Tuya Smart Life.
I have google home to control everything, but I still have to set them up using the original apps. I haven’t checked out Tuya, I’ll have a google thanks.
You can set up devices over zigbee with home assistant, and then control them with Google home
https://www.home-assistant.io/integrations/google_assistant/
Probably easier to just use the official apps, though.