Update:
So I called them earlier today to ask how I can reschedule my interview if it gets scheduled while I'm traveling overseas, and they confirmed to me that my appointment has not been scheduled yet, consistent with the status on my online account. Later in the day, I logged in again because I needed my receipt number, and lo and behold, the status changed to "Interview Was Scheduled"!! My appointment is scheduled for August 3, which is annoying because July tickets are expensive unless I book toward the middle or end, and right now I don't feel like trying to reschedule because I finally got the date!
I feel a mixture of annoyance and excitement lol
I guess sometimes it takes an aloof phone call to remind or motivate them 😉🤷♀️