Since iOS 15 is an older operating system, you must find a version of the Netflix IPA that was built for it.
Searching for modified versions that promise higher bitrates or unlocked UI elements. What Does "Extra Quality" Mean? netflix ipa ios 15 extra quality
While there is no official "Extra Quality" version of the Netflix app, this term often refers to modified IPA files (like Netflix++ or Netflix VIP) shared in sideloading communities to enable features not typically available on older software like iOS 15. Since iOS 15 is an older operating system,
: If you are on iOS 15, the App Store should naturally offer you the "last compatible version" if you have previously "purchased" (downloaded) Netflix on your Apple ID. Manual IPA Installation netflix ipa ios 15 extra quality