I can only go by what I see on the broadcast. Several times I’ve seen shots of a FG kicker warming up into the net, even late in a game. There was one game I recall where a team had to call a timeout because “they couldn’t find the kicker”. What do they do, leave him by himself and then whistle for him to come?
I don’t know if a similar scenario takes place before a kickoff. One would think the kicker would be paying attention to what’s going on and maybe stand close to his coach, but what do I know.
Things can likely get pretty chaotic on the sidelines in a big game like this, but that’s why they pay the head coach the big bucks. I would also rather have a coach be micromanaging than assuming everybody knew what they were supposed to do.