Other than the 64 flat half converting to 2.10, I don't think this record stacks up against others as being any more or less suspicious.
Her differential from Kiptum's time was around 7.5%, which is pretty massive but I think this race today is better considered compared to Kipchoge's sub 2 given the conditions.
Namely, she has the massive advantage of being paced by two men who metronomed the effort, running in a big pack until around 20-25k and then coming through the back of the men's field in the last few kilometres. No solo running on a very fast course
The differential there is 8.6% between Kipchoge and Ruth C.
Compare that with Assefa and Kiptum - 9.5% or Kipchoge's 2.01.09 vs Kosgei at Chicago (also paced) at 9.2%.
Take it back to Ratcliffe's 2.15 (paced by men etc) in 2003 compared to the then world record of 2.05.38 then the percentage gap there is 7.7% - a mere 0.2% difference between that and today's time compared with Kiptum's.
You're now comparing an exceptional performance to a derivation of 0.6-0.9% between previous record holders. Then only a 0.2 difference between that and the most alike comparison possible from history.
It's outstanding but not as impossible or improbable as some are making out