YMMV and I know I’ll be judged a gatekeeper, but not knowing: networking, modern CSS, some familiarity with SASS, CORS, basic deployment / platforms, and graphics APIs (!) all seem like pretty gaping holes for a frontend engineer - you’ll most definitely need those when building actual products for the web.
I mean, this is Dan Abramov we’re talking about. Ya know, the guy who created a good chunk of React. I’d say he built actual products for the web just fine.
Not that I would care either way - this is about skill sets and not personalities.