Sauron isn't lying in the finale of Thrones
Sauron finally showed up at the end of season 1 of The Lord of the Rings: The Power of the Ring - and he wasn't actually lying.

Sauron wasn't lying when he tried to seduce Galadriel in the final episode of The Lord of the Rings: The Ring of Power. The first season of Amazon's Lord of the Rings prequel series essentially sold itself on a mystery that wasn't solved until the final episode. The end of The Ring of Power finally confirmed Sauron's true identity, revealing that he had been acting under the alias of Halbrand, manipulating Galadriel to ensure the first Ring was forged.
Galadriel realizes the truth too late, and is foolish enough to confront Sauron directly. He uses his black magic to get into her mind, using hallucinations and hallucinations to lure her to him. Sauron claimed that his actions were not motivated by a desire for power, but a desire for peace, a desire to heal the devastation Middle-earth suffered from its long and bitter war with Morgoth. The scene is beautifully done, continuing J.R.R. Tolkien's portrayal of Sauron as a fallen angel, his Lucifer figure, the one who tempted Eve in the Garden of Eden, and the one who tempted Jesus at the beginning of his mission. It shows how even an elf like Galadriel can fall and Sauron is attractive For her goodness and twist it.
The Rings Of Power Really Did Reveal Sauron's Motives

Most viewers would assume Sauron was simply trying to get into Galadriel's mind, taking advantage of the friendship he formed with Galadriel under the pseudonym Halbrand. But he was able to make such an appeal precisely because it was indeed his motivation in the Second Age of Middle-earth. According to J.R.R. in Tolkien's notes, the author planned to reveal that Sauron had abandoned his master Morgoth shortly before his defeat at the end of the First Age. Sauron did dream of uniting the people of Middle-earth and undoing the damage caused by that conflict. However, this would eventually be twisted into a desire for power and control, causing Sauron to become as evil as Morgoth.
This further deepens the Lucifer/Sauron similarity. The Christian Bible sees Lucifer as the father of lies, and the most persuasive lies are half-truths and half-false. Sauron was able to seduce Galadriel precisely because she sensed the honesty in his words, and it took a tremendous amount of willpower to see through his words and realize that the world of peace and order he promised would be his s position absolute power.
How Will Sauron's Motives Influence The Lord Of The Rings: The Rings Of Power?

This may establish Sauron's plans in Ring of Thrones Season 2. All the best villains believe they are the heroes of their own stories; Sauron of the Second Age is no exception. He sincerely believes that he alone can provide salvation for Middle-earth, and by doing so justifies his insatiable appetite for power. This would lead him to seek out the three elf rings forged in the finale of Lord of the Rings: The Ring of Might, simply because he wishes to control the elves. This would eventually lead him to secretly forge the One Ring, a ring above all other rings, allowing him to control those who wield the other rings.