There is at least one in the UK. Apple Store is expected to have abnormal flow of people in the fall and holidays next year. The iPhone 15 series is expected to be released during this period. Apple Milton Keynes employees were told they are not allowed to take leave between September 15, 2023 and October 7, 2023, and December 2, 2023 and early January 2024.
This means that the leave application during this period will not be approved by the store manager. While streams of Apple new devices, especially before and after the release of new iPhone models and during the holidays, the latest instructions from the store appear to be unprecedented agreement changes in the region.

Apple usually prohibits vacations before and during holidays, which is usually direct notification to employees in a short period of time through Apple's internal communications applications. The latest change, that is, the ban on vacations about one year in advance, is conveyed more concealedly through memos released by the local area.
store manager claims that the directive comes from the "shop above" level. In a "moment of rapid development", this change is introduced to employees "to ensure we are better prepared for next year."
is not clear at this point of view how wide the scope of this indication is, but the date is obviously selective, probably considering the launch of Apple's new devices in the second half of next year and the increase in flows during the holidays.
is not possible yet for any definite launch date for the iPhone 15 series, and the device itself may also require production verification tests before the mass production schedule can be confirmed.