The SQLite documentation's primary audience is C programmers who will compile the library into their own program, or people otherwise using the latest version. If your distribution provides an older version, you should be consulting your distribution's documentation (`sqlite-doc` package for Fedora, I believe). That said, the SQLite Web site does have [a changelog](https://sqlite.org/changes.html) that lists all notable feature additions over the last two decades. Searching that has usuall been fruitful for me.