This is now completed https://gg.deals/announcement/new-feature-epic-ubisoft-ea-games-can-now-be-imported-to-your-ggdeals-collection/
Importing EA App library doesn't work natively, but via Playnite. However, the native sync wouldn't be possible for now, due to the fact that EA doesn't allow user profiles to be public, and we have no other way of scanning your library.
Let us know if you encounter any issues with the Playnite sync!
Also - once the public profiles become available on the Electronic Arts website, we will be happy to build a native solution too!