Can BookyAI create an index at the end of my book (keywords with page numbers)?

Yes, from version 1.9.15. Open your book and click "Index" at the top of the page, next to "Quality review", then click "Compile the index". BookyAI reads the finished chapters the way a professional indexer would and proposes the headings a reader would look up: people, places, organisations, works, events and ideas, with every wording the text uses for them. A full book takes a few minutes and you can keep working meanwhile. Every proposed heading is checked against your text: a heading the book does not contain never reaches the list. When it is done you review the list, and the index is included in your exports automatically. In the PDF it prints real page numbers, each one a link to the passage, in two columns with letter headings. It needs a working AI engine (the same one your book uses) and at least one finished chapter.