There’s a good chance that any titanium plate will be there to replace a section of excised skull bone. And the best way to ensure that an incision is invisible is to do it through the hair of the scalp, (particularly for girls).
What this may have to do with the eyebrow is a matter of conjecture, but I would say in reassurance that this will not be this surgeon’s first rodeo.
The recovery procedure may include black eyes. Don’t let that throw you off. It should all clear up.
I’ll tell my niece! Thanks, though. I suspect she will have asked the surgeons all about it.