It sounds like you're looking for a high-quality (FLAC) copy of the soundtrack or score from You Season 4, Episode 1. Let me clarify a few things and provide a helpful guide.
If you need the score in FLAC, buy the soundtrack on Qobuz. If you need the episode's full audio lossless, buy the Blu-ray and rip it yourself. Avoid sketchy "FLAC" downloads claiming to be the episode.