This sounds like you might be looking for an of Young Sheldon Season 5, Episode 16, as M4B is a standard file format for audiobooks. While there is no official "audiobook" for this single episode, it features a special narration by adult Sheldon and Amy (Jim Parsons and Mayim Bialik), which gives it a more "audio-rich" feel than a typical episode. " Young Sheldon S05E16: Financial Ambition and Family Fallout
Here’s a social media post you can use for — perfect for a blog, forum, or audiobook-style sharing group: young sheldon s05e16 m4b
The user is specifically searching for the .m4b extension. This distinguishes the request from standard video piracy searches. This sounds like you might be looking for