Intel's biggest issues are that they don't have a track record nearly as long as TSMCs and Samsung's, and their Forevos packaging may need to be accounted for vs the others as well. When delays and shortages can result in the losses of millions, if not billions, of dollars, there's no incentive for companies to go all in with IFS for some time.
As far as a merger is concerned, I wonder if the dark horse in the room is Texas Instruments? They're an American company with a very reliable track record and produces of tens of billions of chips a year. Perhaps if IFS were spun off from Intel it'd be something like a 50/40/10 ownership between TI, Apollo, and Intel.