Georg Ledermann PRO said about 2 years ago on Infinite Scrolling with Hotwire :
The first drawback of the no-JS approach can be mitigated by this code in the controller:

class PostsController < ApplicationController
  ...  
  def index    
    respond_to do |format|
      format.html
      format.turbo_stream { @pagy, @posts = pagy_countless(Post.all) }    
    end  
  end
  ...

It ensures that posts are loaded for turbo_stream requests only.