Hi @kjy106906
the linker file and startup code is prepared to use standby RAM feature which can keep the content of RAM during standby mode. So, it makes sense to not include initialized data to this section. The linker file explicitly mentions that:

And you can find in startup code that this RAM is initialized only after POR:

Of course, if you don't want to use this feature, you can update the linker file and startup code as needed.
Regards,
Lukas