A: Absolutely not. The save files are incompatible. Attempting to sync will flag your account for cheating.
Downloading a "Geometry Dash 2.3 APK Repack" from third-party sites carries significant digital safety risks: Malware and Adware geometry dash 23 apk repack
If you find a legitimate version of the Geometry Dash 23 APK Repack (and that’s a big "if"), here are the features typically advertised by uploaders: A: Absolutely not