It sounds like your NVIDIA Control Panel might be in a simplified mode or missing some options that are usually available for adjusting the GPU settings.
Check if the Control Panel is in Simplified Mode.
Open the NVIDIA Control Panel
Click on the View tab at the top.
Ensure that Add "Run with graphics processor" to Context Menu is checked.
Also, make sure that Show only programs found on this computer is unchecked.
If there is an option to switch to an advanced or full mode in the Control Panel, enable it. This will allow access to more detailed settings, including selecting the preferred graphics processor.
Please let me know if this worked for you.