What exactly are you looking for?
SQLite for all intents is a “language” of its own (as a subset of SQL) and the commands are executed via Xojo database functions.
But since Xojo can use more databases than just SQLite, I doubt you will find much specific documentation in the Xojo docs?
Do you have some specific questions? or just SQLit in general.
You would be much better off forgoing this tool, and writing yourself a class to create the database and tables in code instead… that way you have visual access to what is going on, when, and why… making it much easier to maintain in the future…