: Install the latest realme USB Drivers and Android SDK Platform Tools on your PC.

The unlocking process takes about 30-60 seconds. The phone may restart once or twice.

If you tell me what you plan to do next, I can provide a guide for: with Magisk Installing TWRP Recovery Finding the most stable Custom ROMs for Realme 6

You need a Windows or Mac computer with ADB and Fastboot drivers installed.