Flashing custom ROMs is a high-risk activity. It voids your warranty, can brick your device if done incorrectly, and may compromise security.
We are not responsible for any damage to your Vivo Y51. Proceed only if you understand ADB, Fastboot, and recovery flashing. vivo y51 custom rom upd
If you were to write or find a useful article on this topic, it would likely cover: Flashing custom ROMs is a high-risk activity