FWIW-

Eons ago, I saw patent drawings for a system wherein tires were fitted with two tubes, with two valves opposite each other.

The tubes were carefully inflated so they shared the volume 50/50. In the event of a puncture, the surviving tube would expand to fill and support the tire (at half pressure) preserving the system's integrity.

It's been a long while, so I've forgotten whether the intent was for Auto, MC, or bicycles, but the idea always intrigued me.

Schwalbe Procore was similar, fitting a small section high pressure tube (and tyre) in a larger tubeless tyre for rim protection and tyre retention. It seemed like a good idea at the time, I don't know what killed it. But I can guess: cost, weight, complexity, difficulty fitting.

In a bike that was given two me, which needed a tube, I actually placed two 20x2.125 tubes in a 20x30 tire and rim, since I did not have a tube that width. I drilled a hole opposite of the other tube. Worked OK,, thank God. But which bikes of certain kids who ruined a tire thru "drifting" (skidding), sometimes I have placed the middle tread of an old tire inside the skinned one, covering the hole first with T-Rex tape. Works until they lose their bike, or can buy a new tire. On an electric shooter with stiff 8.5 tires (which should be solid fill) that kept getting flats, which take more time to fix on the sidewalk, I placed and taped an old military belt inside. Never saw a flat again on it.