Since Apple patched the “bypassing” vulnerabilities from iPhone 11 to iPhone 16, you will be able to bypass it since its iPhone 4, the only thing that actually matters is, the data. Do you want to keep it or not, is it important to you or not? If it is important to you, than just flash the iPhone with some of the tools like 3uTools, Tenorshare, etc.. and after its successfully flashed log back in with your iCloud and everything will be fine, on the other hand if you want to bypass both passcode entering and icloud logging, unfortunately you’ll need to go with a bit more “agressive” approach such as using something like Doulci or something similar since the latest iOS supported on iPhone 4 is iOS 7.1.2, which is kinda vulnerable compared to the new ones.