one mp3 file with chapters

Hello,

I need your help. I was trying to find a solution here. I want to export my audiobook as mp3. This I can do as multiple files. However, I'm trying to export it as a single file with the chapters "build in" so people will only need to download one file instead of multiple files. I'm sure there is an easy way to do this. Can you help? Much appreciated.

Please help.

I didn't find the right solution from the Internet.

References:-
https://forum.audacityteam.org/viewtopic.php?f=64&t=82658
Home Device Video

Thanks