Study of pedophiles published in APAs (American Psychological Association) journal found that:
"With respect to gender, 455 participants (38.3%) said that they were attracted only to females, 420 (35.3%) only to males, and 314 (26.4%) to both males and females."
In this largest study of pedophiles ever from APAs journal they find that 61.7% of pedophiles are homosexual/bisexual
https://psycnet.apa.org/doiLanding?doi=10.1037%2Fabn0000212

Approximately one third of victims of sex offenders are boys, in English prisons there were about 3000 sex offenders of whom only 12 were women, conclusion being that female pedophiles are extremely rare. From this we concluded that homosexuals could comprise 33% of pedophiles https://www.taylorfrancis.com/chapters/edit/10.4324/9780203411773-10/adult-sex-offenders-dawn-fisher
https://www.hrw.org/legacy/wr2k8/violence/violence.pdf

About 33% of victims of child sexual abuse are male, and 97% of pedophiles are male
Thus (in the scenario with least homosexual pedophiles) over 30% of child sexual abuse is done by homosexuals
https://bjs.ojp.gov/content/pub/pdf/CVVOATV.PDF
https://www.hrw.org/legacy/wr2k8/violence/violence.pdf