Is Khawla bint al-Azwar a real person, and is it true that her fighting in the Battle of Yarmouk was likened to the fighting of Khalid ibn al-Walid?

Narrations are valid if their chains of transmission (asanid) are sound, connected, and narrated by trustworthy, upright, and precise narrators. As for the stories mentioned about Khawlah bint Al-Azwar, they have not been transmitted with authenticated chains of transmission. Rather, they appeared in a book attributed to Al-Waqidi, whose connected narrations are not taken as evidence. The people of Hadith have agreed upon his weakness, and despite people relying on him for maghazi (military expeditions) and history, the book "Futuh al-Sham" (The Conquests of Syria), in which these stories were mentioned, has not been authentically attributed to him. What further supports their invalidity is that his student, Ibn Sa'd, did not indicate the existence of a sister for Dirar ibn Al-Azwar. Instead, he narrated from Al-Waqidi that Dirar died before the Battle of Yarmouk during the time of Abu Bakr, while the alleged stories about Khawlah revolve around her searching for her brother during the war with the Romans in the time of Umar, may Allah be pleased with him. In conclusion, the stories of Khawlah bint Al-Azwar are not authentic; they are more akin to legends.