https://idevicecentral.com/jailbreak-tutorial/how-to-jailbreak-ios-14-5-1-ios-14-0-using-checkra1n-jailbreak-with-cydia-and-tweaks/
How to Jailbreak iOS 14.5.1 - iOS 14.0 using CheckRa1n Jailbreak With Cydia and Tweaks