In its first two seasons, Star Trek: Strange New Worlds debuted updated versions of some of the characters from Star Trek: The Original Series, but several important faces have yet to be introduced. Following the adventures of Captain Christopher Pike (Anson Mount) and the USS Enterprise, Strange New Worlds takes place before Captain James T. Kirk (William Shatner) takes over command of the iconic starship. Kirk himself has already made his Strange New Worlds debut, portrayed by Paul Wesley as a young lieutenant aboard the USS Farragut. Lt. Spock (Ethan Peck) also features prominently in Strange New Worlds, after having been introduced in Star Trek: Discovery season 2.
https://screenrant.com/star-trek-strange-new-worlds-season-3-tos-characters/