Kidney related problem. Or chronic?

My brother had been feeling problem of hypertension vomiting loss of appetite from 15 days. The pressure was 180/129. There was no swelling in any part of the body. He was just admitted in hospital . Where his diagonosed creatinine value 21.2 and urea 233 . Patient previously had no diabates history and no hypertension history. He was totally fit. There was no complication. But everything has happened with in just 15 days. He has recently taken covid 19 vaccination before admission of hospital being unaware about his kidney disease. Now dialysis has done once . My question is that this condition indicates kidney failure. But is it cronic or a acute kidney failure? There was no history of kidney related disease or diabetes and hypertension. He is just 21 years old. This sudden fall of kidney what indicates? Acute or chronic?