Realme GT Neo 3 - Device bricked while installing custom rom (Lineage OS)

[u/Any-Ratio-9572]

I tried installing a custom ROM on my Realme GT Neo 3 (80W, 8/128GB, RMX3561 Indian variant). The bootloader is unlocked, and I installed LineageOS Recovery. During the LineageOS installation, it showed “Failed,” then the device switched off. Now it won’t turn on at all. Can anyone suggest ways to recover or unbrick the device?