People really don’t have a scientific understanding of refeeding. Unless you suffer from malnutrition there is almost zero possibility of refeeding syndrome and you ending up in the hospital after a 7 day fast. The most you might experience is an upset stomach or diarrhea
I find bone broth starts digestion for a “first meal” next meal I’ll added some veggies and maybe protein to the bone broth and have a soup. After that some raw veggies like a salad. I’ve found I don’t experience discomfort when starting to eat again when I do it this way.