When using getAssetFromKV, it infers the Content-Type of the requested asset and sets it to the Content-Type header. That code is here.

The issue is that for Content-Types such as text/html and text/plain, it is often preferred to append this: "; charset=utf-8". This does not happen currently.

Of course I can do this myself, but something like this should be built-in. Maybe as a new option.