She was neither top 3 in last nationals nor being assigned to Nebelhorn Trophy / Finlandia Trophy [i.e. events held before or after 1 week when the regional starts]
So she needs to compete at regionals...
Actually a 4th place finish is quite impressive for Yuma's JGP debut.
And I think those who ranked 1-4 in their first events can get another one (automatically).
That's based on a JGP selection event held in June/July...
Her diet is now regularly monitored by a dietitian (since season 2017-18)
To be frank, it is better than what she did before.
I remember she mentioned in an interview held in 2016 or 2017 that she didn't eat rice during her dinner at that time.