Apple may soon let you set third-party apps as the default on iPhones. Currently, users are forced to use Apple's offerings as the default app for opening links, emails, navigation, etc. The feature is expected to make its way alongside iOS 14.
https://www.notebookcheck.net/Apple-might-let-users-set-third-party-apps-as-defaults-in-a-future-version-of-iOS.454327.0.html