I am a science fiction writer. In my world there is this space ship that has a drive that has a real time mapper that can map the atomic particle frequency in this space, map the frequency of a far off space and through harmonic resonance move the ship from point A to point B instantaneously. Is that even somewhat like a real possibility? I like my sci-fi stories to sound plausible.
Without context, "frequency" and "harmonic resonance" sound like buzzwords. They do not sound like a realistic means of faster than light travel. Unless you can say how your universe is different to ours, it doesn't sound like science, it sounds like magic.
In our universe, mapping the atomic particle frequency of separated areas of space will not allow you to use harmonic resonance to travel from the one place to the other.
That's not to say that it couldn't be made to sound plausible, but that's as much a matter for Writing SE as Worldbuilding SE. Here on worldbuilding SE, we'd probably be talking about Alcubierre drives in the real universe, and even then it's debatable if they're actually achievable.
The rule of thumb for hard-science scifi is You cannot transmit information faster than the speed of light.
I am told information is rigorously defined by people much more informed than me. But it certainly includes things like a string of data, a parcel of money, or the dimensions of a spaceship.
So it doesn't matter what the heck is a "real time mapper" or an "atomic particle frequency" or an "harmonic resonance". Anything that lets you instantaneously move a spaceship from one point to another is prohibited by the rules of physics, and by extension hard scifi.
By the way, (quantum) entanglement is not a get out of jail free card here. This is a common misconception around here, and you will find much better explanations than I can give by using the search bar.