There’s no official FLAC release of Young Sheldon episodes. FLAC is a music format, not typically used for TV show dialogue + sound effects. Episode audio is usually encoded in AAC or AC3 inside the video file (MKV/MP4).
FLAC for Young Sheldon S03E12 is unnecessary. Stick to a high-bitrate MKV with original AC3 audio. If you see a FLAC file labeled as the full episode’s audio — it’s a gimmick, not an upgrade. young sheldon s03e12 flac
So you searched for — and you probably landed here wondering if there’s a high-res lossless audio version of the episode floating around. There’s no official FLAC release of Young Sheldon episodes