app crash with below reason. Could not instantiate class named UINavigationBarAppearance because no class named UINavigationBarAppearance was found; the class needs to be defined in source code or linked in from a library

Hi, current app's minimum ios version is 9 what is benifit to update to 10, 11, 12, 13, 14, 15 i couldn't find any resources, what is benifits may have for deploying app updating minimum version and deployment target on each versions. is there any site or resource update log for minimum version supports?