Review on an out-of-stock child ASIN when Parent ASIN is still available with other child ASINs

Hi- We are a new Seller- into Saree sales, and I have a doubt regarding review mechanism. I have a case scenario.

For a single Parent ASIN I have 6 child ASINs (color variants) of each 1 unit stock only. If one or few of the child ASINs are sold out then by default, the corresponding ASIN would displayed as out of stock. My customers may want to give reviews on the purchase.

1) Will the review on an out of stock child ASIN variant, be possible by the buyer of the last available unit?

2) When a buyer gives review for one of the child ASIN, will this review apply and be visible for the other entire child ASINs mapped to the same Parent ASIN. Will this review be visible to customers, even if that one specific child ASIN is currently out of stock?

I have sold an ASIN (child- colour variant) of a parent ASIN with 6 variants. After the sale, 5 are shown as available and active, the sold one has been labelled as Inactive. For this inactive ASIN, the buyer has given a review, after the purchase. Will this be available for other balance ASINs that are still active, since I am unable to see the same in our listing- need your clarification and advise.