What is considered social networking in screentime?

Yeah, they don’t provide you a list. BUT I can tell you texting is somehow considered “social networking “ even though I use it primarily for work and communicating with family. Social networking to me is strictly Facebook, Twitter, Instagram, etc. this is a big miss on Apple’s part. It’s unfortunate they don’t allow you to include SPECIFIC apps so you can customize your screen time limits.

Open ScreenTime then click on the bar graph at the top where it gives your total time. It's usually best to switch to Last 7 Days then just above the app listing select Show Categories then select Social Networking and it will show you all the apps that have been using in the last 7 days that are in that category.