It concerns audio contentIn iOS 15.4, Apple has disabled the ability to change the playback speed in third-party apps using the Apple Music API. Now the company has decided to rollback this decision with iOS 15.5. Discuss Apple to get rid of annoying iPhone ban” Apple to get rid of iPhone to annoying ban applications.” The company concluded that it “may be safe to re-enable this feature as it was before iOS 15.4.” to say that this feature was disabled due to a bug that has now been fixed.
iOS 15.5 is still in beta testing, the stable version of the firmware will be released later.