A new paper makes a very solid case that mtDNA R0, which is the sister clade to mtDNA HV (which is the dominant West Eurasian and North African Berber mtDNA clade) has a source in Arabia. It has maximum diversity there in addition to most clades being most common there. R0 is mostly found in Arabia and to a lesser extent West Asia, but mtDNA R0a1 is found at low frequencies across Europe as well and it as well as mtDNA R0a2'3 dispersed in the Mesolithic a.k.a. Epipaleolithic a.ka. 17kya to 13kya or so.
The full story is more complicated but generally fits a Mesolithic dispersal from Arabia which would have served as a refuge during the Last Glacial Maximum ca. 20kya.
The subclade mtDNA R0a2b2 is strongly associated by location, proximity, and age with the Ethio-Semitic migration from Arabia to East Africa, while R0a2b1 which strongly overlaps with it geographically, could be part of the same migration but might be from an earlier wave of Arabian to East African migration as the clade is two and a half times older than R0a2b2 along with a couple of other rare mtDNA R0 clade of the same age.
A rare clade mtDNA R0a6 is found mostly in Pakistan, mostly in the Kalash, but single individuals with this clade have also been noted in Iran, Palestine and Italy.