For KDP, I want to create a table of contents with links for chapters (header 1) only but no links for subtitles (header 2) within chapters. The purpose is to shorten the table of contents, as I have a long list of subtitles. With Word, it automatically creates TOC links for both chapters and subtitles. How can I achieve what I want in Word or other free or less expensive apps or services? I've seen multiple Kindle books with such a TOC.
Here is an example of a TOC I want to make:
Chapter 1 (Header 1) <- with a link
Subtitle 1 / Subtitle 2 / Subtitle 3... <- without links
Chapter 2 (Header 1) <- with a link
Subtitle 1 / Subtitle 2 / Subtitle 3... <- without links