Screen freezing every seconds while playing

Before my game started freezing every second, it was smooth until I reinstalled the game because I purchased Minecraft on my other account. After I installed the app, when I started to play in my world, it started freezing every second while I was playing, and I know it’s not about my phone because it was smooth before. I reinstalled the app many times and restarted my phone, and it still freezes every second. It all happened after the Copper Age update. Hope you fix it ASAP.