Is there any report in the biography of Aisha, may God be pleased with her, indicating that she sought blessings from the Prophet’s grave for rain, where she asked the companions to set up a tent over his grave and supplicate, resulting in rainfall?

This narration is invalid and cannot be authentically attributed to Aisha (may Allah be pleased with her). Muhammad ibn Zubalah, who mentioned it, is weak and cannot be used as a source. The prescribed method of seeking rain (Istisqa') is to supplicate to Allah Almighty in the mosque or in the open desert.