It's possible:
* The name is misspelled. Check for variations in spelling.
* She may be a newer actress. New actors may not yet have extensive credits on major platforms like IMDb.
* She may work under a different name. Some actors use stage names or have changed their names throughout their careers.
Could you please provide more details about Anna Koval? For example:
* Any specific movie or TV show she might have been in.
* Any other information about her, such as her nationality or profession.
With more information, I may be able to help you find the correct information.