Various sources claim that the development of the iOS 13 operating system has been discontinued since Apple switched to iOS 14. An update for iOS version 13.4.5 was released. In the near future, iOS version 13.4.5 will be distributed among developers and beta testers, which will be available to all other users in April.
Updated. Apple changed the name of its iOS and now instead of iOS 13.4.5 it will have a new name - iOS 13.5. What's new in iOS 13.5
The functional development of iOS 13 is really over. Before the official release of iOS 14 in September this year, new versions of iOS 13 will be aimed at fixing errors, as well as improving the stability and security of user data.
It is assumed that iOS 13.5 will not see the light of day, instead we will get another, maybe two versions of iOS 13.4.X. this is not surprising, since neither iOS 11 nor iOS 12 have reached versions 11.5 and 12.5, respectively. So iOS users should not expect any functional changes in the coming months.