Serve SPA (Angular) from Cloudflare R2

I am trying to server my SPA (Angular) from R2. My index.html loads after I added the transform rule as described in the post: Index.html as Root Object for SPA - #3 by erisa-cf

However, the website doesn’t load and I get a 404 error for /login.

I was successfully able to setup using Cloudflare and API Gateway with OCI Object Storage.
I had setup deployment rules as show in the post: Set Up OCI Object Storage and Oracle API Gateway for Static Website Hosting

Do I need to specify similar setting for serving *.js & *.css files? If yes, how?

Would appreciate any help on this.