Book of Mormon geography and historicity is not complicated. Moroni explained that the history of the Jaredites was the history of those who lived in "this north country." (Ether 1:1) Separately, he told Joseph that "the history of the aborigenes of this country... was written and deposited not far from" Joseph's home.
Because Mormon and Moroni wrote the history not far from Joseph's home near Palmyra, NY, and because Moroni explained that the Jaredites lived in "this" north country, we can see that the Jaredites lived in the "north country" that included western New York.
It's very simple (unless you've been persuaded by M2C scholars and their followers who insist the prophets were wrong about Cumorah, that Oliver was an ignorant speculator, etc.)
Those of us Latter-day Saints who still believe the teachings of the prophets about the New York Cumorah know about the ancient giants who lived in "this north country" as Moroni described it.
And it came to pass that they ate and slept, and prepared for death on the morrow. And they were large and mighty men as to the strength of men. (Ether 15:26)
In Moroni's America I quoted what Abraham Lincoln said about the "race of extinct giants" when he visited Niagara Falls. The original, with a link, is below.The eyes of that species of extinct giants - whose bones fill the mounds of America, have gazed on Niagara as ours do now....
In the late 1800s there were newspaper accounts from that area describing the discovery of giant human skeletons deep in the ground. Some from Cayuga and Dunnville are included below.
(click to enlarge)
Note the proximity of Cayuga and Dunnville to both Niagara and Cumorah.