Unfortunately, it is not possible to recover the information from Loader(LDR) file without source code.
If you are having executable(DXE) file, the disassembly window will displays disassembled instructions and symbolic information, which is useful for temporarily modifying the code to test a change or to view code when no source is available.
You can debug the executable file (.dxe) without source files using the below steps.
1. Create new project and build.
2. In debug configuration remove the .dxe and add .dxe which need to be loaded.
3. And debug. Now the disassembled instructions and symbolic information displays in the Disassembly window.