In order to get to the home screen(s), you will need to do one of the following:
1. if Face ID is setup, hold the iPhone up to allow FaceID to recognize the face of the owner.
2. if your iPhone has TouchID, place your finger on the home button to allow TouchID to recognize the owner’s finger.
3. Input the correct Lock Screen password.
If you are unable to successfully do any of the above then I can only assume you are not the owner of the iPhone. You can attempt to reset the iPhone to its default, however, you’re still going to need the iCloud creds to access the device if iCloud lock is enabled.