Regarding your questions: the only reason there is not more mention of the Asiatic Prophets is because Their names seem to be lost in the mists of ancient history. Buddha is mentioned, and Zoroaster, in our Scriptures -- both non-Jewish Prophets or non-Semitic Prophets. We are taught there always have been Manifestations of God, but we do not have any record of Their names.
- Shoghi Effendi (From a letter dated 4 October 1950 written on behalf of Shoghi Effendi to an individual believer; The Compilation of Compilations, vol. I, Extracts from the Baha’i Writings on Buddha, Krishna, Zoroaster, and related subjects)
