@blockbuster98 - No problem, I was also interested because I received this information from those around me last week.
No, it actually happens by chance, but they usually get the deliveries Tuesday through Friday just for the walk-in customers at the Apple store during lunchtime.
Unfortunately, I don’t know about the providers. I’m assuming it’s a different supplier/distributor than Apple.
My colleague, who works in retail, said that the providers and online shops receive their goods from the major supplier “ALSO”. Only insiders know whether this is actually the case or whether, for example, they also shop at Apple at the same time.