Andretti, just like Haas, want to buy everything they can from Renault/Alpine, even if the chassis and aero are supposed to be made by Andretti, it doesn't sound really credible with the current factory and it's not really promising to develop and produce a formula car without an exclusive F1 factory, F1 engineers or other greater experience. Building a 12-year-old Indycar-spec chassis on which further development is allowed almost exclusively on the shock absorber (and Andretti has failed to do this in recent years, which is why there are neither Indycar titles nor Indy 500 victories) is not the right expertise to build an F1 car from scratch. But you also won't attract a substantial number of F1 people with the US location, they don't even want to go to Audi in Switzerland/Germany from the UK. What's more, Andretti hasn't done anything for ages in any of the categories in which they are currently competing, mind you, nowhere with a car they built themselves and everywhere in spec series and still 0 title ambitions anywhere.
The bottom line is that it's good for F1 that this Haas construct is failing so spectacularly and falling further and further behind. The difference between F1 and virtually all other major motorsport categories worldwide is the development, production and further development of its own F1 car every year. Here in Haas F1 you have a construct that buys all the legal parts from Ferrari, has the car built by Dallara and the aerodynamic parts are developed by Ferrari people in Haas team clothing at Ferrari in Maranello and some of them are probably even manufactured there. Andretti would be not much different in many respects. Haas doesn't have its own F1 factory, Haas doesn't build its own car, money only flows to third parties for contract work in a manufacturer racing series. This is exactly what F1 did not want with the introduction and purchase of parts some years ago. They didn't want investors who just buy everything together and don't have or develop any infrastructure. And yet at the time of Haas' entry, they had no choice but to agree to it. Fortunately, it is not running and has not attracted any other non-manufacturers.
Today it's different, "people" are interested in taking part in F1 again. Even if the bottom line is that there is currently no candidate who really wants to start from scratch with the appropriate capital and become the real 10th team and not just a sham manufacturer like Haas. Audi is again so half-baked because they only swapped Sauber/Alfa, which is certainly not what F1 had hoped for. Unfortunately, this is also a warning to other manufacturers that Audi and even more so Porsche can't do it themselves without buying in infrastructure and expertise. This should set alarm bells ringing in F1, because you won't find a manufacturer who wants to start with billions at 0 infrastructure so quickly.
The likelihood that Andretti could end up driving around just as under-budgeted as Haas is the reason why F1 is not happy to award the grid position and you didn't hear anything at all until now from Domenicali. The teams are all about the money, which they don't want to share with Andretti, that's purely selfish and capitalistic. But also F1 doesn't need another back-bench team from the USA either, which harbours the danger of dampening the US boom even further or destroying it with the Haas vs Andretti battle for the penultimate place among the constructors. In the end, it's all about money for F1, which could dry up with the Andretti risk, but above all the danger of alienating the American spectators at the track and at home on the screen.
Realistically, they would have preferred to have Audi and Porsche as independent manufacturers with new factories, infrastructure that could have been sold back to Hyundai, Toyota, Honda, etc. a few years later, even if they had left, and would have had a much better future than a Haas warehouse in England and possibly one day an F1 department at Andretti in the States or a second Andretti warehouse in England. F1 simply doesn't need that and GM's appeal is simply too small or too local. GM is rather insignificant outside North and parts of Central and South America.