However, you have run into a digital ghost. Here is the reality of that search. FLAC is a lossless compression format. It preserves every single bit of audio data. In the music industry, FLAC files are common for CDs and high-resolution downloads. In the television industry, they are not.

Save your hard drive space and skip the FLAC hunt for this one.

Here is an article explaining why this specific search is problematic, what audio actually exists for the episode, and how to legally obtain high-quality audio for TV shows. If you have searched for "young sheldon s05e19 flac" recently, you are likely an audiophile with a very specific goal. Perhaps you want the pristine, uncompressed audio of the dialogue, the laugh track, or the background score for a remix, a soundbite, or a fan edit.