do different galaxies have different laws of physics

Probably not

I think I once read of a theory that some of the constants of the universe actually vary over very great distances. But this would not be on a "nearby galaxies" scale of distances. More like "other side of the observable universe or even further".

As for other galaxies being populated with evil superheroes, yeah, probably not.

The earth is a realm consisting of 7 continents that are 7 realms this is why we would say "America the new world" all 7 are governed by the same laws because they are unified but other "planets" I would assume would have different laws just like the dream realm has completely different laws then the awaken state

Read up on Bohr and the discovery of quantum mechanics. Once you understand how the nature of electrons structures the elements of the periodic table, you should be able to come up with your own hypotheses about whether different galaxies could have different periodic tables or whether they are all made up of the same stuff governed by the same mechanics of particle interaction.

Scientifically speaking other galaxies have the same laws of Physics as our galaxy.

This is a basic axiom of science. There has been discussion that some values of constants may change over time (although I think this has been rejected based on observation), the assumption is that the laws of Physics work the same throughout the Universe.

Of course, we have never been to another galaxy... so we have no direct experience of how things work in other galaxies. However, we can make observations, we can see how Galaxies move, and we can look at the electromagnetic radiation that comes from Galaxies. We have no reason to believe that other galaxies don't follow the same laws.

Choosing evil as a way of life doesn't affect the laws of physics, Trump is testimony to that.

Maybe we should check "Janes, all the galaxy galaxies"

Wow! Stunningly irrelevant

Galaxies exist within the same physical laws.

If you accept multiple universes, your question has more relevance.

They all seem to have a lot of dark matter surrounding them so they don't fall apart whatever the hell dark matter is other than a mathematical spin on the account of the phenomena. Different laws of physics you ask? What difference are you looking for? In our bubble observable Universe, the Laws of Physics are Universal.