Would work best as a single season anthology series. It needs to set audience expectations and let everyone get comfortable with the formula. When the audience has been trained to accept the rules, it can start bending the rules, then break them in the last episode or two. By the end he's moving between episodes we've already seen and maybe even running into "future" episodes which will never actually exist.

This also let's you hint at an actual character and motivation for our narrator. Who would expect the narrator to get an arc?

There was a Twilight Zone episode about a guy who could record anything into his tape recorder and it would come true, and he could undo it by throwing the tape into the fire in his fireplace. When Serling finished his closing narration, the guy with the tape recorder said something like, "I've had just about enough of you!" and throws a tape into the fire and Serling disappears. I think it's the only time there was any interaction between him and the characters.

The hudsucker proxy did this a bit

I feel like this needs a lot more full stops.

That is a horror concept I would watch.

I'd watch the shit out of this.

This is pretty similar to the MCU’s What If…? series

Alan wake sorta has similar vibes with Zane and Wake having control over their world through their writing and using that to twart the antagonist, and with Wake as the narrator. It even has an in-universe expy of the Twilight Zone. It is a video game though, and doesn't have the comedic aspect.

Did they have a stroke at the end there?

you're visiting, but he lives here, and now he's decided that he's the story he's narrating is Home Alone

Wut?

This is a great concept! I’d love to see it/read more about it!

I think something like this happened in the Series of Unfortunate Events tv show but it’s been a while since I watched