The moon map in Genshin appears to refer to the Nod-Krai map expansion, and the first release was on September 10, 2025 with Luna I: Song of the Welkin Moon: Segue. A later map-related update, Luna VI, was reported for April 8, 2026.

What that means

  • If you mean the original Nod-Krai / “moon” map, it already released on September 10, 2025.
  • If you mean the next major map expansion in that storyline, reporting pointed to April 8, 2026 for Luna VI.

Current nearby update

  • The next major Genshin update in the same arc was reported to release on July 1, 2026 as Luna VIII.

If you want, I can narrow this down to the exact map area or patch name you mean.