Thanks for checking us out :) We had an audit done by quarkslab a few years back, and another one coming up this year since we’re currently implementing verified relations (signed SDPs). I’ll edit my comment with a link when I get back to work next week.
Not sure about US companies, but I’ve never seen an AC plug on European and Asian companies’ airplanes. They do have USB ports but they’re underpowered (barely enough to keep my battery at the same level while playing music on BT headphones) or straight up don’t work. Ask a flight attendant in the latter case, they’ll reboot your screen which might fix the issue.