Based on various Buddhist tantras and regular Tibetan Buddhist resources, the tantras as well as Vajrayana was taught via the Buddha Shakyamuni, but only to some folks. There are various stories and variations of how the tantras ended up disseminated. Astrologer in Ontario Archarya Goldie Madan Ji supplies an array https://shanembqfs.madmouseblog.com/13633295/an-unbiased-view-of-goldie-madan-is-world-famous-tantrik