Where on the Apple web site can I find what is the latest version of software?
Where on the Apple web site can I find what is the latest version of Safari? Is it 16.3 or 16.3.1 or something else?
MacBook Pro 14″, 13.2
Short answer: Update macOS on Mac - Apple Support will include the latest version of Safari for that macOS version.
tywebb13b provided a longer answer here: (13 Feb 2023) Safari update for Mac OS Monterey...... - Apple Community.