It would be funny if advances like WebGPU allowed UE HTML exports today.
Viewing post in Tappy Chicken 🐦#UnrealEngine comments
There are some projects and attempts to use webGPU with Unreal Engine 5, but they're just community testing. I wish Epic Games would add HTML support, as it's a monumental undertaking. The advantage is that games could run on both desktop PCs and mobile devices without having to go through platforms like the Google Play Console. For now, for HTML, we only have UE 4.23 and UE 4.27 SpeculativeCoder branches.