。
She is flustered.
Literal
She [topic-は] flustered is.
どぎまぎ is a 擬態語 (state mimetic) for the inner shaking of being caught off guard, embarrassed, or not knowing how to respond — flushed cheeks, stammered words, fumbled gestures. Often paired with する as the verbal frame, then with ~ている for the ongoing state. The doubled syllable shape (どぎ + まぎ) is typical of mimetics; the rhythm itself feels like the unsettled wobble it describes.