HTML5 build is way too big

I have UnrealEngine 4.19.2 and even after following the recommendations, and activating wasm and gz, still the build is ~150mb and I am just compiling the plain new project with just the grey platform.
It is hard for end user to wait for a 150mb page all at once, is there a way to, at least, brake it down into several files and download them progressively in browser ?