Here is the full list of all 45 LEGO Star Wars: The Skywalker Saga achievements worth 1,000 gamerscore.
Achieved True Jedi in every level
Completed The Skywalker Saga
Completed ''Episode IX - The Rise of Skywalker''
Completed ''Episode VIII - The Last Jedi''
Earned 10,000,000,000 studs
Completed ''Episode VII - The Force Awakens''
Completed ''Episode VI - Return of the Jedi''
Completed ''Episode V - The Empire Strikes Back''
Shot helmets off 50 enemies
Completed ''Episode IV - A New Hope''
Collected all Minikits in a single level
Completed ''Episode III - Revenge of the Sith''
Defeated 3 enemies at the same time with an explosion
Completed ''Episode II - Attack of the Clones''
Completed ''Episode I - The Phantom Menace''
Completed a flight level without dying
Achieved True Jedi in any level
Achieved a combat multiplier score of 30
Completed all 'Level Challenges' in a single level
Earned 17,000 studs
Complete all events on Geonosis and Tatooine
Complete all events on Bespin, Crait and Hoth
Complete all events on Cantonica, Yavin 4 and Ajan Kloss
Complete all events on Kamino
Complete all events on Coruscant, Jakku and Takodana
Complete all events on Kashyyyk and Kijimi
Complete all events on D'Qar, Naboo and Pasaana
Complete all events on Ahch-To, Endor, Kef Bir and Exegol
Complete all events on Dagobah, Mustafar, Utapau
Complete all 'Level Challenges'
Collect all Minikits
Fully upgrade a character class
Fully upgrade all of the character classes
Collect every datacard
Collect 1000 Kyber Bricks
Collect all characters
Complete all of the events in the Galaxy
Complete all races in the Galaxy
Complete all Galaxy Challenges
Use Jedi Mind Tricks to make 5 people fight simultaneously in the Cantina
Ride all creatures throughout the Galaxy
Destroy 100 TIE fighters
Create 25 disguises as a Hero character
Complete all the Jawa's ''Faulty Droid'' missions on Tatooine
Complete all the GNK droid escort missions