They did both. The Umayyads simultaneously invaded the Indus Valley, North Africa, Iberia, Italian islands, Anatolia, Greek islands, Central Asia, Khazaria, etc....
India was not on the priority list. Constantinople and Rome where the goals and conquering North Africa was part of achieving these goals.
Didn't they lay siege to Lhasa ?They did both. The Umayyads simultaneously invaded the Indus Valley, North Africa, Iberia, Italian islands, Anatolia, Greek islands, Central Asia, Khazaria, etc....