When using External Connectors such as JSON, Google Sheets Provider, among others, you can use a single Text element in your Graphics to show, for example, first names and last names when they come separately.
To do so you just need to:
(1) Add the Text element
(2) Bind the value
(3) Add a Prefix or Suffix
(4) You will see the first name and last name on your Graphics
Display values as a single Text by binding one of those values to the main Text value, and the other one to a prefix or suffix.