the iddah of the girl who hasnt reach puberty will be in the house of his husband or father?

I need help to clear some misconception in my head specially what I understand about marriage : I read some conflicting information on the subject tell me where I am wrong -islam didnt set a marriage age - a father can marry a non puber girl if it s good for her but generally you should avoid those marriage ( nawawwi and shafi'i) - you can consumate the marriage if the girl can do it with out any harm - it s his father who knows what s the best time to send his daughter when he feels she s ready , Imam malik said that source but here is what I am lost some people are saying -that the dad can only send the girl to his husband when she reach puberty (https://islam.stackexchange.com/questions/49806/is-it-right-to-marry-a-young-girl/49810#49810 but this same person also stated that it s only a minoryty of ulama who are saying that because of surah 4 verse 6 ) but when I see the tafsir of 65:4 it s clearly talking about young girl who didnt menstruate but Allah have said in verse 65:1 and 65;6 the female have to stay in the husband house and it is mandatory during the iddah here is my question : **what about the young girl who didnt menstruate yet is this apply to her too?** my understanding is since she has to do his iddah in his father house where she already is( as Malik said ) any info of info of this particular iddah? the girl can do the iddah in the house of his father? I am have searched that on a lot of site and didnt find any ulama saying they is a iddah in the father s house . I know when the girl is married to a man but doesnt live with him yet it s called Sinn Az-Zawaj سن الزواج so is Allah is referring to the divorce of this kind of marriage in surah 65:4? if the girl didnt leave the house any way is it really a divorce? as you see I am confused .