I've repeated myself here with this quote. I apologize for that.
Kind regards.
You apparently do not understand what has been said in these and other instances: There were a great many different peoples and cultures living in Mesoamerica in Book of Mormon times. The text of the Book of Mormon itself limits just where and under what circumstances these peoples may have interacted with or even assimilated with the peoples of the Book of Mormon, from Jaredite times right down to the end of the Nephites. During that entire period, there is no reason I know of why the Book of Mormon peoples would ever have been cross-identified with the Maya, even though the Lamanites would likely have known and interacted with the Maya within the Guatemalan altiplano. The Nephites and Mulekites would likely have been centered along the Grijalva River within the southern Mexican state of Chiapas, which is not a Mayan area. Because the Maya are so well-known, people naturally think of them when discussing Mesoamerica, a mistake which you apparently make as well.
"The easy confidence with which I know another man's religion is folly teaches me to suspect that my own is also." Mark Twain
It is more likely that he was unfamiliar with the local geography of Central America, being aware of the general shape of the American continents, until he read Stephens and Catherwood's book.
This is actually what I meant. I have assumed from what his mother described that Moroni showed him much information about the lifestyle of the BoM inhabitants, but I assumed the lesson didn't come with a map or use of current names he would recognize. He would have to know both sets of geographical detail in order to connect them up.
When you climb up a ladder, you...begin at the bottom...ascend step by step, until you arrive at the top...so it is with the principles of the Gospel--you must begin with the first...go on until you learn all the principles of exaltation. But it will be a great while after you have passed through the veil before you will have learned them. It is not all to be comprehended in this world. Joseph Smith