As the worldwide electronics shortage continues growing in scale, Apple has recently been hit hard by it. Being a major buyer of silicon, many of its products rely on the material. This lack of chips and silicon has caused the production of some products to be delayed. According to Nikkei Asia: These issues have meant that Apple has been forced to push back production of a “portion of component orders” into the second half of the year.
It is unclear which exact models are effected, as well as if some of apple’s other devices will have delays, but Nikkei reported that the components used for the production of iPhones are “Tight”, meaning that the possibility of a delay is not entirely off the table.
For more information about the delays, see this article by 9to5mac.