The former was last seen in Joe Johnston’s Jurassic Park III (which also featured Laura Dern’s Dr. Ellie Degler/Sattler) and the latter was featured in both The Lost World: Jurassic Park and Jurassic World: Fallen Kingdom.
The sequels maintained them as individual protagonists.
As intimated above, both Sam Neill’s Dr. Alan Grant and Jeff Goldblum’s Dr. Ian Malcolm have previously returned to star in Jurassic Park follow-ups, but their characters have not crossed paths on screen since they flew away from Isla Nublar in a helicopter together.