How to override and refresh loaded asset at runtime by mounting pak file manually?

Thanks!
However, what I want is that the level does not reload, only individual assets, is this possible?
Theoretically, an object has a loading process when the game starts, which must have some function calls. If I call these functions to load objects again at runtime and require reading from the updated pak file system this time, can I update resources at runtime?
I am still looking at the UE source code, but I am worried that I can’t find such a loading function.