Agreed but she's at least 25 due to the article she has of Flash still missing. She's possibly older than Barry and Iris right now
Her character is in her late 20s or so, about the same age as Barry/Iris.
Barry disappears in 2024 and Nora said she was born a few years before that, so 2021 or 22. She showed Barry a newspaper from 2049 so she's from at least that far in the future.
On topic: Nora is just completely throwing the timeline in the bushes