If T'Pol (Jolene Blalock) guest stars in Archer attending the founding of the United Federation of Planets in 2161.
In Strange New Worlds season 2, T'Pol would be about 172 years old. T'Pol was born in 2088 on Vulcan, and she was about 63 years old when the NX-01 Enterprise launched in 2151. Of course, Vulcans are very long-lived compared to humans, and they regularly double the average Terran lifespan. Ambassador Sarek (Mark Lenard), the father of Spock (Leonard Nimoy), was 202 when he died in T'Pol does appear in Strange New Worlds, she would inevitably be elderly, although there are sci-fi means to have T'Pol appear as Jolene Blalock's current age, which is in her late 40s.
How T'Pol Can Appear In Strange New Worlds
Strange New Worlds could easily invite T'Pol to come aboard Captain Christopher Pike's (Anson Mount) USS Enterprise. As the last living member of the NX-01's crew, T'Pol would be Enterprise royalty, and she's a symbol of the storied starship's legacy. An older T'Pol setting foot on Pike's starship would be akin to when iral Leonard McCoy (DeForest Kelley) toured the USS Enterprise-D in Star Trek: The Next Generation's premiere, "Encounter at Farpoint." It would also be fun to involve T'Pol in a Strange New Worlds mission where her vast experience could come into play to solve a crisis. And, of course, T'Pol meeting Lieutenant Spock (Ethan Peck) would be Star Trek magic.
However, there's another means to bring T'Pol into Strange New Worlds where the Vulcan wouldn't be elderly. Holodecks may not be available on Pike's 23rd-century Starship Enterprise, but in Strange New Worlds' season 1 finale, iral Pike appeared from the future via a Klingon time crystal. That same deus ex machina could be employed again to bridge into the late 22nd century in order to bring T'Pol aboard the Enterprise so that Jolene Blalock can play her Vulcan character at her current age. T'Pol as a guest star from Star Trek: Enterprise and interacting with Pike's crew like Number One (Rebecca Romijn) and La'an Noonien Singh (Christina Chong) would generate as much excitement as Star Trek: Lower Decks.
How Old Spock Was In TNG And J.J. Abrams' Star Trek Movies
Comparatively, T'Pol was older than Spock was during his tenure aboard the Starship Enterprise and after. Spock was in his 30s during his five-year mission as Science Officer with Captain James T. Kirk (William Shatner), and the Vulcan was 55 years old when he died (the first time) in Star Trek II: The Wrath of Khan. When Spock guest starred in Star Trek: The Next Generation's "Unification" two-parter, the Vulcan, who was born in 2230, was 138 in the 24th century. In J.J. Abrams' alternate Kelvin timeline in 2258. If T'Pol guest stars in Star Trek: Strange New Worlds at her current age in 2259, she would have outlived Spock in both timelines.
Star Trek: Strange New Worlds Season 2 premieres in 2023 on Paramount+.