There is this review that havent found any effects:
https://www.mdpi.com/2072-6643/15/12/2666
Note that they excluded 274 out of 283 studies, considering only 9. It's in mdpi which is not great.So, the jury is still out I guess
The jury is not out -- it's an unconfirmed hunch that, as the study you link notes, risks harming patients who are having trouble keeping down food as it is.
This is just keto and fasting fans pushing their obsession on cancer patients. Same for marijuanauts -- anti-nausea drugs have long outperformed cannibinoids but you still have stoner friends offering you spliffs (ok, save them for later)