Did Wakanda reverse engineer alien technology?

[neatoman]

It didn't have to be a spacecraft to explain the material, no. A meteor is a perfectly fine explaination for the material itself, the question is more about how they learned to use it, for which a spacecraft would help explain it.

Human beings have made use of copper for at least 9000 years but electrical engineering wasn't really a thing until 200 years ago. If they had samples of vibranium technology to study, that would make the process of figuring out how to make something useful out of it much easier.