Your students (and you) can sync (import) their games played on lichess. In the “Preferences” section, there will be a section called “Sync games”:
They can enter their lichess/chess.com usernames in the input box and click the “Sync Games” button to sync their games from those platforms.
After the games are synced, the student will have a new database of their lichess/chess.com games:
Student’s lichess games are synced to the database
Student’s chess.com games are synced to the database
Also, the databases will be shared with you (and other coaches who have been assigned this student). Therefore, you can find your students’ lichess games in “Shared Databases” under their folder: