Can you find out something like that?

How or where can I see which RAM module is installed in my laptop?

Try in cmd

wmic memorychip list full

There's usually an opening at the back, if you unscrew the flap from it you can have a look at the RAm. The Ram modules in laptops have the "SODIMM" design, the biggest difference should be between DDR3 and DDR4. Google your model and see if the RAM name is somewhere.

You can also use the CPU-Z program. This shows all information about all components. (Name, measure, temp., …)