Do add to it, every other competitor had 4 minutes to initiate a challenge, but since Chiles was last to compete her team only got 1 minute.
Edit: I am sorry. I am incorrect. According to the rules, ref page 44, other competitors have until the next competitor is scored. The last competitor’s coaches have 1 minute to initiate an inquiry into the difficulty score verbally.
After any verbal inquiry is submitted, the coaches then have 4 minutes to submit the written inquiry.
I found this article explaining Olympics rules:
The challenge can only be brought forward after the gymnast’s final score is posted and before the end of the next gymnast’s routine.
Floor routines are a maximum of 90 seconds, plus you figure maybe at least 30 seconds between a final score going up and the next person starting their routine.
Yep, except for the last gymnast to compete, which Chiles was
For the last gymnast or group of a rotation, this limit is one (1) minute after the score is shown on the scoreboard.
