Positive Psyche Technical Writer Entry Position interview questions

I chatted with the interviewer for a few days and we scheduled a phone interview for 04.01.2021 at 9:30a EST. I did not hear from her the day of the interview, nor has she responded to my follow up email. If something came up, that's understandable, but it's unprofessional to ghost on an interview and ignore me when I check in to see what happened.