AFAIK continental drift can be measured over a period of years. Are you saying it cannot?
As for the existence of electrons, neutrons, protons, neutrinos, etc., we can formulate experiements to test theories about the existence of all of those. The experiments can be repeated, falsified, etc. Are you saying this is not the case?
Sure. Put a stake off Cape Cod, check back in a couple million years, and measure the drift with a tape measure. : )
"As for the existence of electrons, neutrons, protons, neutrinos, etc., we can formulate experiements to test theories about the existence of all of those."
And we do the same with evolution (although the hecklers invariably shout "microevolution" and "the experiment was designed").
I understood your objection to be the lack of eyewitnesses to long-durational speciation events, i.e., no one was there to "see" it, so there's no proof it happened. To the extent this is, in fact, your objection, it's groundless. There's a whole lot of science that is premised on inference from circumstantial evidence (and a whole lot of criminals in jail based on the same inferential process).