Apple stopped signing iOS 9 years ago. Even genuine iPhones cannot downgrade to iOS 9 unless the user saved SHSH blobs during the signing window – and even then, that’s a complex process requiring specialized tools.
If you want the iOS 9 experience without the risk of "bricking" your phone with unverified zip files, consider these safer methods: iPhone Keyboard iOS Emojis
"Exploring the Feasibility of Downloading iOS 9 Signed ZIP for Android Devices"
Be cautious when using online tools or services.
This is for end users. It requires termux, proot-distro, and compilation experience.
Searching for "iOS 9 signed zip for Android" often leads to untrusted websites. Be cautious of the following:
Any .zip file labeled "iOS 9 signed for Android" on forums, torrent sites, or file lockers is nearly 100% malicious. Security researchers have found banking trojans, keyloggers, and ransomware disguised as such packages.