https://www.yahoo.com/lifestyle/study-finds-between-long-haul-190947119.html
If this research is correct and that Long Covid is caused by damaged mitochondria, then fasting would absolutely be beneficial
https://www.nobelprize.org/prizes/medicine/2016/press-release/in 2016 Yoshinori Ohsumi won a Nobel Prize for his research which showed the role that autophagy plays in cellular repair (including damaged mitochondria) and fasting drastically increases autophagy while the traditional 3 meals and snacks prevents autophagy
You claim to follow science....well this is science