It's possible that:
* The name is misspelled: Perhaps the correct spelling is slightly different.
* The person is not a public figure: Many actors and crew members have private profiles and don't have their work readily available online.
* The person is new to the industry: If they are just starting out, their credits might not be widely known.
To find more information, you might consider:
* Checking databases like IMDb: Search for the name and see if any results appear.
* Looking for online film and television resources: Websites like The Numbers, Box Office Mojo, and All Movie Guide may have information.
* Searching social media: Platforms like Twitter, Facebook, and Instagram could have profiles for the person.
Let me know if you have any other information about Konstadinos Karvelis, like their age, location, or any other projects they might be involved in. This might help me find more relevant information.