As UE doesn’t provide any similar effect and it seems no one else found an easy way to do it, I try to mimic this effect without designing a new font by myself.
Using outline and outline material like this:
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It’s fake because it’s basically a radial gradient at the center of every letter. So it’s not perfectly matching the letter shapes. But it’s kind of convincing.
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Thanks for sharing! This is a cool way add some glow to text!
I noticed that they have added outlines to text in the UMG Widgets, which is a great improvement from how it was before! 
Great stuff! It’s a shame though that it doesn’t accept black color for the glow, cause black is transluscent in premultiplied alpha, so you can’t simulate a soft shadow 