Gordon B. Hinckley made some interesting statements about the "Blood of Lehi" and Chichén Itzá
President Howard W. Hunter made an interesting statement related to Book of Mormon geography quoted in a Deseret News article in 1995
From these two statements it’s clear that Joseph Smith thought the Book of Mormon happened over all of the Americas.
it’s pretty clear that the Promised Land extends from North America to South America. The United States is the Promised Land. Mexico is the Promised Land. Brazil is the Promised Land. Etc.
These two quotes demonstrate how apostles are open to a smaller geographical size for Book of Mormon lands, rather than a larger size.
These cylinders do show that it's possible for a writing similar to the "reformed Egyptian" on the characters document to have existed in ancient Mesoamerica.