It’s there a list somewhere of good non-cloud home automation devices… I don’t want to install custom app per brand of lightbulbs ffs
A good start-
Zwave and zigbee are 100% local by design.
Anything running an esp chip is usually flash able.
Check home assistants integration list for things you are considering buying.
Cloudfree.shop has a lot of local only devices
I'd highly recommend at least giving it a try. Every single month, they keep making it better and better.