Do anti-trust regulations apply only to literally exclusive product-source companies?
I remember when AT&T’s takeover of DirecTV was being vetted. The claim was that it would create a monopoly in satellite TV availability. It was hilarious. In the first place, there was Dish. In the second place, dominance in only one means of delivery while earth bound cable TV is a massive provider, was risible.
I also remember when Eastman Kodak, which at one time was as close to being a monopoly as you could get in film sales and photofinishing, was forced under threat of anti-trust to charge more for their products to allow competition to come in selling for less. What happened was that people preferred the yellow box, happily paid excessive amounts for the products, and Kodak laughed all the way to the bank.
Capitalism in tooth and claw allows for unfettered competition. Those who provide the best for less win.