How do I access application page?

It is weird that most phone has (homepage+apps page). Where homepage you customize what you want and application page shows you what you installed etc.

THE PROBLEM IS MY REALME PHONE INSTALLED TIKTOK AND FINEASY THAT I THOUGHT ALREADY UNINSTALLED UNTIL I GO TO GOOGLE PLAY STORE ONLY TO FIND OUT THESE APPS ARE ALREADY INSTALLED IN MY PHONE AND IT KEEPS ACTIVE ITSELF CAUSING ME UNABLE TO UNINSTALL OLD APPS?