The female never really seemed to get comfortable, so I transferred both back to the original tank with the others.
I’m going to wait and see if a pair forms naturally and then separate them. I added some more hiding places in the original tank and the betta’s will be out tomorrow, tanks are already set up, just waiting for new filters to arrive.
I really believe they are still juveniles. The male never really colored up enough to be identifiable, so perhaps a few more months will make the difference in being able to tell species and gender.