For realme UI 7.0 & 6.0 & 5.0 & 4.0 & 3.0 & 2.0:
System apps are usually designed to be non-removable because they contain essential functions and services required for the operating system to run, such as Settings, Phone, and so on.
But for some built-in apps that do not impact the function like YT music, realme Store, etc.., you can uninstall them.
For realme UI R & S & T & U & Go Edition:
System apps are usually designed to be non-removable because they contain essential functions and services required for the operating system to run. Uninstalling these apps may lead to system instability or even prevent the system from functioning properly.
Therefore, to ensure the normal operation and security of the device, system apps are typically locked as non-removable.