Is PUBG created with UMG?

As my leader wants to use MyGUI instead of UMG, it’s for effiency.He hates blueprint ,and forbides to use it.
So guys, is PUBG or other large games created with UMG?

Seems like you could implement it in C++ but I don’t see any pre-made ad-dons, which is usually an indication of the fact it doesn’t play well or interest anyone using Unreal.

Also, Unreal is in a legal battle with PUGB makers, so I really doubt they would disclose what the third party does under the engine’s hood anyway.

Obviously, it’s another layer of complication that you can totally avoid in engine by just using the tools you are provided with that already have all the required button actions etc.