Looking at summer comp. scores and technical content, Hannah Herrera (currently has the 6th highest NQS Senior score of 176.20, 5th at Glacier Falls, 1st in the FS -
link to her protocol) could have been listed as a sub for Nepela. Maybe she will be considered for a later Challenger or Senior B? Herrera is still ISU Junior age-eligible in 2023-24 (final season; will be 19 in December) although she elected(?) not to compete at the US Junior Team Cup in Milwaukee.
Starr Andrews is scheduled to make her season debut at the Kings Cup International (new name for the senior/junior singles international at the U.S. Autumn Classic NQS in El Segundo, CA in early October). I can't copy-and-paste her part from Golden Skate's "Evening with Champions" review but will post the article link in the EWC show thread.