The scar is at the bottom (just above the ear) and would go either half way or all the way around and end at the same point on the other side.

Yes Follicular unit extraction (FUE) is possible, it has less yield than strip harvesting but if you don't need to maximize donor area it's a good option to avoid a scar (you'll still have micro scars from extraction area but it's much less visible).

But in Elon's case, it's clear he underwent strip harvesting for at least 1 implant.