Apple has the benefit of the original Netflix exclusives model (and the original TV primetime distribution model) that they don't operate their own studios and instead can pick and choose from the cream of the crop of the more expensive projects from the others. (Severance is from Ben Stiller's Red Hour mini-studio, Ted Lasso and Shrinking are from WB Television, Slow Horses and Pluribus are from Sony Television, Foundation and Murderbot are from Skydance/Paramount Television, and so forth.)

I'm sure Apple is contributing significantly to many of those shows' budgets and helping them all reach similar quality bars, but Apple is also certainly benefiting from spreading that budget across multiple studios and not putting all their risk in (micro-)managing their own studio. Whereas a lot of the "streamer X has gone downhill" seems to be directly related to being able to source projects only from sibliing studios creating very simple monocultures of every project feeling the same and risking that bad or unlucky projects tainting other projects in that monoculture stew.