why won't my apex legends account let me add cross platform even though

@simpledynamics Thank you for providing all these details!

I see you have enabled the correct permissions in your EA Account and the friends aren't showing up when adding them through Apex Legends.

You could perhaps try adding them on your EA Account that's linked to your Nintendo Switch account.

To do that, you will need to log in on EA App using a PC/Laptop/Mac and add your friends through EA App. The friends on your EA App list should automatically show up in the game, so perhaps that's a way to fix this.