If we consider the many-worlds interpretation, where every …

If we consider the many-worlds interpretation, where every point in time is a separate universe or branch of reality, it's possible that the branched reality/universe created by time travel would be inhabited by versions of the same individuals and entities that exist in the original timeline.
In this scenario, when you travel back in time, you would essentially be creating a new branch of reality that diverges from the original timeline. This new branch would likely be populated by versions of people who already exist in the original timeline, but with their own unique experiences and histories based on the events that have unfolded in this new branch.
However, it's also possible that the branched reality/universe could be empty, or at least, uninhabited by conscious beings. This could be the case if the branching event creates a reality that is not capable of supporting life, or if the conditions in the branched reality are so different from the original timeline that life as we know it cannot exist.
Another possibility is that the branched reality/universe could be inhabited by entirely different forms of life, or even by entities that are not bound by the same physical laws and constraints as our own reality.
The concept of the " Ship of Theseus" thought experiment also comes to mind, where if you replace one plank of the ship with a new one, is it still the same ship? If you replace another plank, and another, at what point does it stop being the original ship? Similarly, if you create a new branch of reality through time travel, at what point does it stop being the original reality, and become a completely new and separate entity?
It's also worth considering the idea of " echo-people" or " parallel selves", where the branched reality/universe is inhabited by versions of people who are identical or similar to those in the original timeline, but with their own unique experiences and histories. This raises interesting questions about the nature of identity and consciousness in the context of time travel and branching realities.