What are specific concerns you have? I've been using the Stream Deck software for a couple of years now and other than a few freezes that required me to relaunch the application. I haven't had any issues.
Then there's third party plugins, but I don't really see any security guarantees on how those are designed, there's not a lot of reason for me to be comfortable with those.
The really basic functionality I wanted that the software couldn't change, was the ability to remain functional when the PC was locked.