2xx series HTTP status codes will vary for API responses depending on the HTTP method applied. It is likely your GET response status code will be 200, but for POST you will have 201, and for PUT and DELETE you will return a 204. Of course, the usage of HTTP status codes will vary depending on the legacy approach to APIs, but 200, 201, and 204 will get you most of the way to where you need to be.
Consistent usage of HTTP status codes to demonstrate successful API responses saves time and money when it comes to using APIs in applications and integrations. When you are the consumers of your own APIs within 1st party applications, this can add up fast. Standardizing how you communicate the success of API requests begins with a single API, but then will have a greater impact once standardized across all of your HTTP APIs.