Go back to the main menu, select Install , find the iOS 14 zip file, and swipe to confirm.
Go to Wipe > Advanced Wipe and select Dalvik, System, Data, and Cache.
If the ROM doesn't include Google services, flash the GApps zip immediately after.
Place the iOS 14 ROM zip file in your phone’s internal storage.
Flashing a ROM wipes all data. Backup your photos and contacts to the cloud. How to Find a Verified iOS 14 ROM Zip File
💡 If you find the ROM installation too difficult, you can achieve a similar look using Launcher iOS 16 from the Play Store combined with an iOS Icon Pack . This does not require unlocking your bootloader!
Power off your phone and hold Power + Volume Down (or Up, depending on the model) to enter TWRP.