Is SmartThings compatible e with Feit lights and cameras?
Unfortunately, no. 
At this point, integrations are the responsibility of the device manufacturer, so you should contact them and let them know that you would like to see a smartthings integration.
Meanwhile, the first rule of home automation still applies: “the model number matters.“
For those models which have Alexa integration, you may be able to get a partial integration that way. See the community FAQ: