If the tool claims to work on any Huawei phone released after August 2018 (P20 Pro, Mate 20, Nova 5T, any P30, P40, Mate 40, 50, 60), it is a scam.
Historically, Huawei devices used an 8 or 16-digit code to remove network restrictions. These codes were originally generated based on the device's huawei unlock code calculator 16 digit upd