The 2021 UEFA Europa League final referee is Clément Turpin. His French team is assisted by Slavko Vinčić as 4th official and Pol van Boekel as one of the AVARs.
Below the image the names of the full team. If quotes available, they’ll follow.
Referee: Clément Turpin (France)
Assistants: Nicolas Danos, Cyril Gringore (both France)
4th official: Slavko Vinčić (Slovenia)
VAR: François Letexier (France)
VAR Assistants: Jérôme Brisard, Benjamin Pages (both France), Pol van Boekel (Netherlands)