I'm on macOS Mojave. I've right clicked the BDMV file, then clicked "Show Package Contents." I've found the video stream which is a .m2ts file. I imported it to Handbrake, and in the chapters tab it shows only one chapter (which is the whole movie). I see other different types of files in folders and thought one would be chapter index/files or something.

Is it possible to create chapters using a BDMV file through Handbrake? If so, what file do I need to import from the BDMV? Or how do I accomplish this?