The vast majority of males who are trans aka "transwomen" are heterosexual, though - meaning attracted to women/girls. And they develop their opposite sex identity in adolescence or adulthood.

Yes, a majority (about two-thirds) of persons who develop sex/gender distress in childhood prior to puberty of adolescence will grow up to be same-sex attracted (gay, lesbian or bisexual). However, most people who have sex/gender dysphoria in childhood before puberty outgrow it in the course of going through adolescence. The exact numbers vary depending on the study, but all the longterm studies that followed people from childhood into adulthood have found that the majority - 73% to more than 92% - desist from having dysphoria as they mature physically, emotionally, cognitively and sexually. Out of every 10 kids who want to be the opposite sex as young children, most will have lost that desire by their mid or late teens - and only 1 or 2 will carry that desire into their 20s. Those who persist in their 20s often outgrow it after their brains have reached full development at 25 or so.

Gender dysphoria that develops in adolescence or adulthood, however, is entirely different to GD that develops in childhood before puberty - and in looking at later-onset GD, patients/people affected have to be divided into two distinct groups by biological sex. Males who develop gender dysphoria during or after puberty and in adulthood do so for very different reasons than females who develop gender dysphoria at the same ages and developmental stages. In fact, "gender dysphoria" in the two sexes is a completely different phenomenon.