Hello, there's such a situation, the baby is completely on breast milk…

Hello, there's such a situation, the baby is completely on breast milk, now he's almost 8 months old, of course, we also give him complementary foods for a week, I want to switch to formula, there was a trial of Hipp formula, he doesn't want it, cries, I tried, the taste is definitely awful, I wouldn't even eat it myself. Can you tell me, has anyone encountered this? What formula is most similar to breast milk or sweeter than others? He loves Hipp oatmeal porridge in rare cases too, it's sweet tasting.