An IPA (iOS App Store Package) file is the archive file format used for iOS applications. Normally, users download apps like Garena Free Fire directly from the Apple App Store. IPA files can be manually installed using tools like Cydia Impactor or sideloading methods — but only for legitimate purposes such as testing by registered developers.
There are cloud services that claim to sign IPAs directly on your iPhone without a computer. Free Fire Ipa File