Victor Timely made his debut in Loki Season 2, after the Kang variant was briefly teased in the post-credits scene for the third Ant-Man movie. Also counting He Who Remains, this is the third version of this character fans have seen in the Marvel Cinematic Universe. Introduced in Season 1 and Ant-Man and the Wasp: Quantumania as Nathaniel Richards, the character played by Jonathan Majors is the MCU's most important villain right now.
Source:https://www.cbr.com/loki-victor-timely-kang-explained/