Is the marriage contract valid if the wife does not receive the dowry agreed upon outside the contract session, even if the value of the gifts presented by the husband exceeds the value of the dowry, and is it advisable to forgo demanding it?

The validity of the marriage is not affected by not naming the dower (Mahr) or by not handing it over at the agreed-upon time. It is the woman's property, and she has the right to donate all or part of it to her husband, or to waive it before it is handed over to her. It is recommended to name the dower within the marriage contract itself, but if the dower is not named, the contract is valid by consensus, though it is disliked, and the woman is entitled to a dower equivalent to that given to women of her status (Mahr al-Mithl).