Do you think after Endwalker there will be time travel?

[Jandor]

I mean, yeah, further time travel is... not likely, but we're also not in a closed time loop. G'raha Tia's travel across time and space actually created a separate timeline, which is mentioned in the last Tales From the Shadows. Alexander IS a closed time loop, though, but G'raha/The CT isn't.

Don't think too much about it.

It's not necessarily a separate timeline, the apocalypse world could be a separate world within our timeline. There is a rather large precedent for multiple copies of the same world existing across the same timeline in-universe.