This character is a Other Letter and is mainly used in the Arabic script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written as Arabic letter from right to left. When changing direction it is not mirrored. The word that U+062F forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with 15 other glyphs.
The Wikipedia has the following information about this codepoint:
Dalet (dāleth, also spelled Daleth or Daled) is the fourth letter of the Semitic abjads, including Phoenician dālt 𐤃, Hebrew dālet ד, Aramaic dālaṯ 𐡃, Syriac dālaṯ ܕ, and Arabic dāl د (in abjadi order; 8th in modern order). Its sound value is the voiced alveolar plosive ([d]).
The letter is based on a glyph of the Proto-Sinaitic script, probably called dalt "door" (door in Modern Hebrew is delet), ultimately based on a hieroglyph depicting a door: