Doesn't have to be day and date of release for apple to learn that they don't want to upgrade.
Most enterprise customers have customer management teams at apple and like, so they can easily learn that company [x,y,z] may not buy full fleet upgrades (or even partial fleet) and downscale manufacturing.
I bet that chip fab costs are high right now. If apple knows they can slow production down until next spring, they may chose to do that to save money.
Anyway the long wait times for devices make it pretty obvious this is a supply issue, not a demand issue.
This is in Sweden where we're taxed about 50% (I make 50% of what my employer pays for me), this might make us give away iPhones to employees like it's nothing.
Think of this: Employment tax, 30%, income tax 30%, value added tax for goods, 25%.
My employer doesn't have to pay either of these, but if I were to buy an iPhone I'd have to pay all of it. I imagine this affects how generous our employers are giving us "tax free perks".
I had to argue the case with my boss(CEO) to get a cheaper phone since I break them quite often and felt shameful bringing the bills in for repairs.
Now that I'm changing jobs my new employer asked "what gear do you want", I could get essentially whatever I wanted. Seems like a kitted System76 laptop and a Fairphone 4, is what I'll stick with.
TL;DR: Tax affects who gets what in what way.