Modify binding with ingame menu ?

[Erasio]

As far as I know it’s only available through C++ and apparently quite fiddly.

However Rama made one a bit ago and pretty much gives it away. You can just use that in your project!

[Full Project] Rama's UMG Rebindable Key System, Rebind keys at Runtime! - Programming & Scripting - Unreal Engine Forums!

I hope this helps.

Cheers