I wouldn't mind seeing an empty feed that says, "your friends didn't post today," or whatever. They have to fill the feed because I'm not paying them and they need the engagement.

But if I were paying them, even a little bit, then maybe they could. But I didn't know there was a friends-only feed so I'll check that out.

If you are on the mobile app, click on the burger menu and select "Feeds". You will then have a page that has tabs at the top. "All" will be selected by default, but if you select "Friends" you will see only posts from your friends. If you have completely caught up it will be empty and will say that you have caught up and seen everything your friends have posted. There are still ads, but you don't get all the reels, and crap posted by people you don't know.

Go to the "feeds" page and select "friends".