Hello, thanks for reaching out.
The airfield you mentioned is actually on the map (https://www.windy.com/airport/ESNC?62.411,13.747,11,p:metars).
However, because it doesn't report any weather observations, it's not visible on lower zoom levels. Try zooming in and you will see the point.
Moreover, for better experience you can add it to favourites using heart icon. This helps to find desired stations much faster.