Did Owen Rath know that Anakin Skywalker turned into Darth Vader?
Darth Vader's true identity has been kept secret, and only a handful of Star Wars characters know what happened to Anakin after Order 66. How about Owen Russ?

Obi-Wan Kenobi's Star Wars lightsaber duel with his former apprentice on Mustafar was kept under wraps, raising the question: Owen Rath Lars) Did you know that Anakin Skywalker became Darth Vader? At the end of Star Wars: Revenge of the Sith, Emperor Palpatine rescues a barely alive Anakin from Kenobi's abandoned death on the banks of a lava flow, quickly turning him into The iconic Darth Vader. Kenobi and Master Yoda planned to hide Anakin's two newborn children from the Sith, giving one of them - Luke Skywalker - to his step-uncle and aunts Owen and Berulas.
During Palpatine's reign as Emperor, the true identity of his apprentice was kept a secret, and only a few Star Wars characters knew that Anakin was Darth Vader. Besides Obi-Wan, Master Yoda also knows the truth, as well as Ahsoka Tano, R2-D2 and C-3PO, and even Senator Bail Organa. However, Owen Lars was left out and harbored a bitter grudge against Obi-Wan, who told him that Anakin died on the night of Order 66 simply to hide Vivian from the Sith Lord's stepbrother. Da's identity. It's a lie Kenobi certainly didn't want to tell but had to tell to keep Luke and Leia safe from the Sith.
Why Owen Lars Disliked Anakin Anyway (Even Without Vader)

Anakin, like his mother Shmi Skywalker, was born into a slave family, and before leaving Tatooine to join the Jedi Order on Coruscant, Anakin always promised to return to free her and the other slaves. Although she had a good relationship with Owen's father, Cliegg Lars, Shmi spent almost a decade waiting for her son to return before Anakin returned, until she was killed by the Tusken Raiders. To make matters worse, Anakin did return, but only after having disturbing visions of his mother's imminent death. Owen noticed that Shmi felt sad whenever she thought of her son, and Russ always wondered how Anakin could simply leave his home planet to become a Jedi and abandon his mother.
In Star Wars: A New Hope, when Luke wants to know the identity of Ben Kenobi, Uncle Owen responds with vitriol, claiming that "that wizard is just a crazy old man". Russ has always hated the Jedi Order and the fun and adventure that comes with it. Owen doesn't want Luke to be like his father, even though he believes that Jedi Anakin was killed in Order 66. However, this is only to protect Luke, because Russ believes that if He's going to become a Jedi Knight, which will eventually lead to his death.
Why Didn't Obi-Wan Tell Owen About Anakin's Fate?

Ben Kenobi worries that if he tells Owen the dark truth, he might go and tell Luke what happened to his father, which will haunt him. It would also take him away from Owen's vision of Luke improving the family homestead on Tatooine, since Luke wanted to go out and become a Jedi to help fight the Sith. Owen will also be in a very awkward, tense situation when meeting Imperial stormtroopers in his daily life, because he will know the truth behind the galaxy's biggest secret.