Book of Mormon Title Page identifies itself as being written to the Lamanites.
Book of Mormon (1830 ed.), Title Page, The Joseph Smith Papers website, accessed July 26, 2021
The Book of Mormon:
AN ACCOUNT WRITTEN BY THE HAND OF MORMON, UPON PLATES TAKEN FROM THE PLATES OF NEPHI.
Wherefore it is an abridgement of the Record of the people of Nephi; and also of the Lamanites; written to the Lamanites, which are a remnant of the House of Israel; and also to Jew and Gentile; written by way of commandment, and also by the spirit of Prophesy and Revelation.