I think Wikipedia does mention "It can also occur when someone does not eat for several days at a time usually beginning after 4–5 days with no food."

https://en.m.wikipedia.org/wiki/Refeeding_syndrome

The Woman Who Ate 23 Bananas After Fasting 7 Days And Had Refeeding Syndrome

https://youtube.com/watch?v=tWlvWYGztYk