Is taking from what the parents have favored one child with over others, such as sweets or excess food, considered forbidden favoritism, and is a general dissolution of responsibility sufficient from the siblings by saying, "Forgive me for anything my parents favored me with and I took," without specifying what they were favored with?

The parents' favoritism towards their children is not demonstrated by what was mentioned. Allocating a gift to a son due to his need is permissible, and spending on children is according to their needs. Therefore, a father helping his son to buy a phone is not a prohibited form of favoritism. What the mother gives of sweets or food is considered a trivial matter in which equality is not obligatory; because Al-Bahuti said: "It is not obligatory to be equitable among them in a trivial matter, because it is overlooked, so no impact occurs." Accordingly, there is no need to seek forgiveness from siblings, nor to refrain from eating what the mother gives of food in the absence of siblings.