If you find a website offering “Young Sheldon s07e07.m4a” as a direct download, it is likely a pirated audio rip. While the m4a codec is excellent (offering high quality at smaller file sizes than MP3), downloading copyrighted TV audio without permission violates terms of service.
Missy tricks Sheldon into digging up Mary’s prayer garden by convincing him the family has buried a body in the backyard. Episode Cast young sheldon s07e07 m4a