So naruto sealed half of nine tail was sealed inside himawari that why he was weak in boruto In naruto Minato has 1/2 Naruto has 1/2 In boruto Naruto 1/4 Himawari 1/4
@Ishaan Singh dont worry about portions, tailed beasts are highly regenarative creatures so unless the whole chakra is wipped out of existence, it will keep on comming back. so even though naruto burned off all his chakra, himawari has tiny bits of kurama's chakra so he came back.