Ancestry

The ancestries and heritages from Lost Golarion still exist in the Pact Worlds, especially on Absalom Station, where many of them took refuge in the chaos after the amnesiac Gap. You should be able to use these options with minimal adjustments. If a character is from the Pact Worlds, you should be prepared to describe the character's home world, lifestyle, and culture. You might determine this lore yourself or allow players to collaborate, which can be a great way to build investment in the campaign. Changes to these details might inspire new ancestral weapons, languages, lore skills, or even heritages using those of other ancestries from the same planets or who remain in close contact with the Pathfinder ancestry. As many versatile heritages are created by the influence of interplanar exploration and unique circumstances that vary from character to character, most Pathfinder versatile heritages fit seamlessly into a Starfinder campaign.

Starfinder ancestry feats that modify movement speeds and senses might be initially stronger than Pathfinder options, as these abilities often come online at lower levels and are more easily available in Starfinder using armor upgrades, augmentations, and other equipment. You can discuss adjusting these ancestry feats to match the pace of feats from other existing Starfinder ancestries, but be wary of those with physiological disadvantages that are intended to offset their ability to fly or use special senses. The human ancestry is a good benchmark to compare other ancestries to, and to make sure there are no mitigating circumstances beyond these similar feats. Additional bonuses like a Lore skill proficiency can also help offset ancestry and heritage abilities like darkvision that Starfinder characters can get relatively cheaply as an augmentation or armor upgrade. You can also decide to add darkvision and flight to Pathfinder ancestries, choosing to balance the campaign by empowering all the players rather than taking options away.