Hello, I am Mite, an independent advisor and a user like you, and I am here to offer help.
Normally, the system will set the dedicated graphics card as the main GPU. However, if this doesn't work, you can set it manually. Here are the steps about how to do it:
Go to Settings > Display > Graphics. You can add the programs that you want to run on GTX 1650 to the list. Then, select that program. Click the "Options" button. You can choose a graphics card from the menu, which allows you to choose GTX 1650 to run your program.