Is this for static export?

as unless trailing slash is enabled, it should do that

otherwise, i don't think you can do this for general server (without custom weidness like every route end with it)

Unless its static export u cant.

Rewrite requests ending with .html to corresponding pages without the .html

It's not static export.

ahh yeah that actually sounds smart

I tried creating a directory with category.html and for child category, created a separate directory category/

it worked but this is not a proper way so looking for a genuine way

A proper way doesn’t exist

Unless you want to
app/category.html/page.tsx
app/category/settings.html/page.tsx

hmm ..then I have to go with customized routing only

can you provide further details for the same?

app/category.html/page.tsx gives the /category.html route that’s all?

(category.html here is a folder not a file)