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Yes, your iPhone is probably compatible with iOS 15
iOS 15 is available today - Apple
iOS 15 - Wikipedia
About iOS 15 Updates - Apple Support
iOS 15 Compatibility: Is Your Device Supported? - Lifewire
iOS 15 Compatible Devices List: iPhone Models Supporting iOS 15
Which iPhones can get iOS 15? - Macworld
How to download iOS 15 to your iPhone - Tom's Guide
Complete List of iOS 15 Compatible iPhones (Confirmed) - Beebom
iOS 15 - Apple (BY)