I wonder how Apple do it, They always seem to have shed loads of stock available at launch and accurate ETA's as initial stock dwindles Plus i dont think i recall seeing any Apple product such as iPhone or iPads been sold above MRSP, certainly not by the main retailers anyway
It's quite simple - Apple has Tim Cook

Apple has the best supply chain in the world, it's not even comparable to any other company including AMD or NVIDIA. Imagine how many people want new iPhone in comparison to Ryzen3 or RTX3080 - and Apple can still handle it reasonably.
Those excuses you hear "Oh, we didn't know so many people will want to buy our product", "It's a demand issue - not supply", etc etc... those are just lies to naive people to cover up their lack of ability to supply product. Don't you think that NVIDIA and AMD would love to have the stock to fill the demand ASAP and get those billions of dollars that people still have in their pockets and want to give them?