That is what interference effects are: evidence of parallel universes.

When you send a single photon through a double slit, there are places on the other side of the slits that the photon will not go.

SOMETHING is interfering with that photon.

That is your evidence.

SOMETHING is keeping the photon from hitting certain places on the screen. What is doing that?

That thing that "bumps up against" or "interferes with" the smallest particles is what we call "other universes."

There is a TON of evidence for other universes.