While Fastboot mode itself is a built-in, safe diagnostic protocol designed for repairs and updates, using third-party "unlocker" tools carries specific risks:
“Easy Unlocker Fastboot Reader v1 detected my Realme 8 but gave an error. Had to use MTK Client instead.” – Reddit user u/android_nomad easy unlocker fastboot reader v1
Connecting the device to a computer via a USB cable while still holding the button. While Fastboot mode itself is a built-in, safe