If PyCharm does not see the installed psycopg2 package.
When executing a command install packages of Pycharm, it most likely runs the basic command to install psycopg2:
As a result, the module is still not found and reinstallation will not work.
The fact is that for psycopg2 to work on unix systems, you need a compiler and additional libraries libpq, libssl. To install immediately everything in the console of your project, enter:
pip install psycopg2-binary
After that, everything should be ok.