Depending on what you want you can configure a variety of things to show on the user card. As @Firepup650 has we need better details on what your looking for.
Here is a couple of screenshots on configuring the user card
This 2nd SS the bottom 3 are user fields. On Meta Here they added pro noun preferences.
I believe there is a Customization > Theme component that also add or change things in the user card.