Yes, I can add widgets to various sidebars in Appearance > Widgets, but what I’m trying to say is that on the WordPress default Posts page (assigned in Settings > Reading) there is no sidebar present. Adding widgets to the Page Sidebar, Blog Sidebar and Post Sidebar does nothing.
Attaching an three-panel screenshot to show you what a few things look like:
Widgets, Posts page back-end, and Post page front-end.
You’ll see that there is no sidebar in the Posts page in the front-end.
Is there something missing to show a sidebar here?
Thanks!