What is the ruling on saying, "O Allah, I seek refuge in You from associating anything with You knowingly, and I seek Your forgiveness for what I do unknowingly," while delaying the wearing of the niqab to avoid harassment after studying, and is this considered hypocrisy?

The aforementioned supplication is authentically reported from the Prophet, peace and blessings be upon him, and is legislated, especially when fearing ostentation (riya'). Not wearing the niqab out of fear of being harmed is not a form of ostentation, as ostentation is seeking status by displaying good deeds. The mentioned phrase warns against abandoning good deeds for fear of being accused of ostentation, which itself is the essence of ostentation for the sake of people. Whoever's dealing with Allah is sound does not alter their worship, whether in solitude or among people.