U+10A22 KHAROSHTHI LETTER DHA

The Wikipedia has the following information about this codepoint:

The Kharosthi script, also spelled Kharoshthi and Kharoṣṭhī (Kharosthi: 𐨑𐨪𐨆𐨯𐨠𐨁), was an ancient Indo-Iranian script used by various Indo-European peoples in present-day northern Pakistan and eastern Afghanistan. It was used in Central Asia as well. An abugida, it was introduced at least by the middle of the 3rd century BCE, possibly during the 4th century BCE, and remained in use until it died out in its homeland around the 3rd century CE.

It was also in use in Bactria, the Kushan Empire, Sogdia, and along the Silk Road. There is some evidence it may have survived until the 7th century in Khotan and Niya, both cities in East Turkestan.