Do you honestly feel offended or uncomfortable by this? Serious question.
BTW, even if it is pandering (which I disagree) how does that affect you negatively? I'm sure it will be a great movie.
And on a final note, you can't make a BP film and not make it about his African origin and his country. Wakanda is as integral to the BP character as Gotham is to Batman or Atlantis to Aquaman/Namor.
Blade being black, Ripley being a woman etc. Those characters' ethnic and gender identities aren't integral to their stories unlike characters such as BP, Luke Cage, Iron Fist, WW, Lara Croft etc.