Yes, to update your iPhone icon app covers you need to have at least iOS 14 installed on your device.
Compatible Apple Devices
iPhone 12 Models and Any Newer Model, iPhone 11 Models, iPhone XS Models, iPhone 8 Models, iPhone 7 Models, iPhone 6 Models, iPhone SE.
All iPad Pro Models, iPad 7th Gen, iPad 6th Gen, iPad 5th Gen, iPad Mini 4 & 5, iPad Ait 3rd & 4th Gen, & iPad Air 2
iPod Touch 7th Gen & Newer
All Apple Watch Models
Any iPhone Mobile Device Running iOS 14 or NewerÂ