You're quite right. 3rd person omniscient is what I meant to say. I like to write sprawling novels with multiple layered subplots and dozens of characters, often writing a scene from the POV of a character who will never appear again. It's a powerful tool for nuanced storytelling.

I'll use 3p limited sometimes in short stories, when I want to make use of the limitations of the narrator's understanding by inviting the reader to read between the lines and grasp what the narrator cannot.

Hemingway, like many writers of that time, took the omniscient POV. The omniscient narrator knew everybody's thoughts and feelings and shared as fit the story. That approach is out of favor these days, though you'll sometimes see it in genre fiction. No doubt it will make a comeback at some point, but I caution my students against attempting it, as it makes it hard to sell a story to a modern editor.