Concern about breast fat grafting

My breasts have gotten smaller due to dieting ㅠ I used to be a B cup.. now I can't even fit into an A.
I'm losing confidence... I'm seriously considering breast surgery. ㅜ
I heard that getting plastic surgery with fat grafting looks natural and good.
I have seen a lot of people who have had implant surgery.
I don't know if it's because autologous fat grafting is not noticeable or if not many people have had the procedure.
Could you share your reviews from those who have had chest fat grafting, and could you also recommend hospitals in Cheonan or Gangnam?