I recall estimates of ~1 million people during the "golden era" of 4 Nephi. It may have been more than 1 million, if all the marriages and multiplying began in the low teen years, which is likely tautological if we could query Joseph on the matter.
Now, using the approximation of 2% of the population suggested here, we might safely estimate a peak population of about 20,000 "LGB" Nephites during the peak of their civilization.
20,000!?!?! Where are their voices? Same place as the women, I suppose.
Actually, I'm confident Joseph never even considered the possibility of gay Nephites.
But if not explicitly, does the Book of Mormon say anything implicitly on the matter of homosexual Nephites?
It is rather interesting to re-read the text of 4 Nephi.
(bold mine)4 Nephi wrote: 10 And now, behold, it came to pass that the people of Nephi did wax strong, and did multiply exceedingly fast, and became an exceedingly fair and delightsome people.
11 And they were married, and given in marriage, and were blessed according to the multitude of the promises which the Lord had made unto them.
16 And there were no envyings, nor strifes, nor tumults, nor whoredoms, nor lyings, nor murders, nor any manner of lasciviousness; and surely there could not be a happier people among all the people who had been created by the hand of God.
The text does appear to actually obviate the possibility of homosexuals in a utopian Christian society. As in, they don't exist.
Indeed it seems almost certain from these verses, assuming absence of evidence is evidence of absence, that homosexuals in the Nephite population must have been (a) married heterosexually, (b) had lots of children (= lots of hetero sex), (c) lost all homosexual desires and lusts, and (d) could not have been more happy about it.
It's surprising that neither Oaks nor Bednar have incorporated this rather obvious reading of 4 Nephi into one of their love-bigot speeches about The Family Proclamation. It makes their case so neatly, using the Book of Mormon. In fact, a literal reading of 4 Nephi could arguably justify church leaders adopting a more fundamentalist view of homosexuality as a temporary "ill" that vanishes in celestial company.
EDIT: hope none of this comes off as insensitive to those in pain. I'm incredibly bothered by the still-harmful messaging toward LGBTQ+ in the church.