https://developer.apple.com/documentation/ios-ipados-release-notes/ios-ipados-17_4-release-notes At the end of each release note there is a number, eg 121566625). What are these numbers?
What are the numbers that seen next to the ios sdk release notes ?
My guess: that's probably an internal reference (sequential number or some type of internal coding convention ?). I guess that for each modification of code they attribute a reference number to allow proper tracking.
You have also in some cases the FB that is corrected.