This is likely FRP (Factory Reset Protection). You must enter the Google account password that was on the phone before the reset. If you don’t know it, go to Google’s account recovery website on a PC.
This is the most common method, especially if you cannot access the settings menu. How to Hard Reset TECNO Spark Go 2020
Once the phone boots to the welcome screen, you will need to complete the initial Android setup wizard. This includes selecting your language, connecting to Wi-Fi, and signing back into your Google account to restore your backed-up data. This is likely FRP (Factory Reset Protection)