Tools like qobuz-dl-cli use FFmpeg to "mux" (combine) high-resolution artwork and metadata directly into the FLAC file.
The MOD version isolated the API interaction into a separate library, making it more resilient to Qobuz's backend changes. qobuz extra quality downloader github
QBZ-Downloader is a standout for users who want a "software-like" experience rather than a terminal window. Tools like qobuz-dl-cli use FFmpeg to "mux" (combine)