To find the information, simply open the main menu and navigate to the Social tab. There, click on Group.
Here, you will see a button called NAT Type and Connection Quality on the right. After clicking on it, you will get to a screen with detailed information. It will display your NAT Type and provide you with information on what it means for your ability to play with others. For example:
If you are looking to improve your connection, please have a look at our connectivity FAQs:
If the game displays a different NAT type than your platform after performing a network test (check the connectivity FAQs mentioned above for instructions), try changing to a static IP address, if possible. This is how: