For MacBook laptops, there is currently a shortage of motherboards, and as for iPad tablets, the manufacturer is faced with a shortage of displays
The global shortage of semiconductor products has affected all market participants, including Apple, which was forced to postpone production of some MacBook and iPad models due to a lack of components.

Apple has postponed the production of some MacBooks and iPads due to a lack of components
For MacBook laptops, there is currently a shortage of motherboards, and as for iPad tablets, the manufacturer is faced with a shortage of displays and other components. Apple’s official website in China confirms iPad Pro and iPad mini are in stock. As for the iPad and iPad Air, their waiting period reaches three weeks.
According to the Chinese edition of Mydrivers, Apple will unveil new hardware innovations, including the new iPad Pro tablet, next Tuesday, April 13th.
The source adds that the problem with the lack of components did not affect the iPhone.