Organizing Functions in Files in VS 2022

So, I have been trying to figure out how to add directories to an existing project in VS22. If I go into the solutions explorer (CTRL + ALT + L) and I create the folder in the solutions it will not let me add/create a .cpp file or .h file into that folder. I Can’t find another place to add a directory/file to add the header and implementation file. Can anyone help me with this/ understand how to do it?