Does wearing the niqab lead to attaining a higher degree with Allah, and is this degree in Paradise or an increase in reward?

The reward for hijab and modesty, like other religious commandments, is the reward of the pious who obey Allah's commands and abstain from His prohibitions. Allah Almighty says concerning them: "Unquestionably, [for] the allies of Allah there will be no fear concerning them, nor will they grieve. Those who believed and were fearing of Allah; for them are good tidings in the worldly life and in the Hereafter. No change is there in the words of Allah. That is indeed the great attainment." And Allah Almighty says: "O you who have believed, if you fear Allah, He will grant you a criterion and remove from you your evil deeds and forgive you, and Allah is the possessor of great bounty."