You might wonder why you would use an Android 9.0 branch if your phone runs a newer version of Android.
TWRP 3.7.0_9-0 is a major maintenance release designed to bridge the gap between older recovery frameworks and modern Android partition schemes. The versioning nomenclature indicates the base framework version (3.7.0) combined with specific upstream patches and device-specific branch code (9-0) required to decrypt and manage newer file systems. Key Enhancements in this Version twrp-3.7.0-9-0