I think we might have had a similar discussion in another thread.
But no, I do not think there are alternate/parallel universes, or multi-verses.
The whole idea of a Mandela Effect, or Matrix scenarios, or feelings of anachronisms.
I believe there is only ONE universe, with only ONE timeline.
Sci-Fi is full of stories about “what if…” but they are just stories, IMO.
The closest would be a natural and supernatural world.