@vivoy91, @sarabjeetk25090 and @rajveer_sinha,
if we're all talking about a Vivo X21, then the requests to know how to replace the screen can be answered at the Spanish site Nadie Me Llama Gallina, or Nobody Calls Me Chicken. Here's their guide to that repair.
[link|https://www.nadiemellamagallina.com/en/manuales/smartphones-1/vivo-926/vivo-x21-941/pantalla-completa-8248|Manuales / Vivo X21 / Fullscreen|new_window=true]