Common misconception I've seen is that the suit we see in What if, is the same as from the Black Panther movie. Notice how the necklace are different? That suit is basically N'Jadaka's version of T'Challa's CW Suit : r/marvelstudios
Black Panther: How Killmonger Can Wear the Black Panther Suit
Ryan Coogler Answers The 'Black Panther' Infinity Stone Question [SPOILERS] - MCUExchange
Fixing the final battle in Black Panther (Warning: INCREDIBLY LONG ESSAY AHEAD) : r/fixingmovies
Black Panther: How Killmonger Can Wear the Black Panther Suit
Black Panther: How Killmonger Can Wear the Black Panther Suit - IGN
Black Panther Character Posters Revealed
The actors in Black Panther were amazing, but they didn't do everything. These are the stuntmen responsible for the action scenes between Black Panther and Killmonger: Khalid Ghajji and Daniel Graham
Black Panther: How Killmonger Can Wear the Black Panther Suit - IGN
Black Panther Facts - Fluffy The Vampire Slayer - Cats and Horror blog
Black Panther: How Killmonger Can Wear the Black Panther Suit
Marvel's Black Panther: Erik Killmonger Is a 'Revolutionary' - IGN