Is Neo-Vedanta a sect of Hinduism?
This wikipedia article says this:
Neo-Vedanta..... are terms to characterize interpretations of Hinduism that developed in the 19th century. Some scholars argue that these modern interpretations incorporate western ideas[4] into traditional Indian religions, especially Advaita Vedanta, which is asserted as central or fundamental to Hindu culture.[5]
And then it says:
Although neo-Vedanta proper developed in the 19th century in response to western colonialism, it has got deeper origins in the Muslim period of India.[7]
So, Neo-Vedanta seems to be a de-facto sect of Hinduism.