This is what the Orthodox Jewish text Sanhedrin 53b says

"Rav Yosef says: Come and hear a resolution from a mishna (Nidda 44b): A girl who is three years and one day old whose father arranged her betrothal is betrothed with intercourse, as the legal status of intercourse with her is that of full-fledged intercourse."

https://www.sefaria.org/Sanhedrin.55b?lang=bi