iPhone is disabled. Connect to iTunes Isssue

Hi there, my mothers iPhone SE (2020) won't unlock. She changed the passcode on her phone and forgot it and has since been locked out of the phone for entering the wrong code too many times. There is no time limit until the next attempt, instead it asks to connnect to iTunes, which I have done and it seems the only way of fixing it is factory resetting it (losing all the data- not good). I tried updating it on the computer however that failed and leaves me with no options more or less. Also, when I try log into iTunes it asks for a verification code which is sent to the phone which is locked and therefore I'm unable to see what the code is. Is there any way to fix this issue without resetting the whole phone as it is not backed up.

The phone is relatively new and doesn't have THAT much data on it however it has loads of contacts etc which she needs to be kept and cannot afford to lose.

Many thanks,

CTominey