Updating Safari 16.3.1 yields v16.3
Just as an FYI, I updated 3 (201) MBA's running 12.6.3 with the new Safari 16.3.1 update released 02.13.2023. Installed successfully but still shows as version 16.3. Now, I didn't write down the build number so it could be different. Says installed and no other updates available on all 3 machines. Install log shows ok.
Assuming someone forgot to add the correct version number in the app update (unless this is a server issue distributing the previous version.
MacBook Air 13″, macOS 12.6