Why Call Blocking and SMS Anti-Theft features are unavailable on Android 9.0 or later?

Google has recently updated its Permissions policy for Play Store apps and has added more restrictions on the apps that access Call logs and text messages or SMS. It requires App Developers to remove SMS permissions and Call Logs. For more information, read the Google Play Permissions policy.
To comply with these policy changes, the Call Blocking and Anti-Theft features using SMS or Text Commands are currently unavailable in JioSecurity on Android OS 9.0 or later.