Python - minheap not working

Result:
Order(s):  [['02012022 1300', 165720252206939, 'Black Forest', 1.0, 90, 'New'], ['01012023 1500', 16572025295153491, 'Black Forest', 2.0, 160, 'New'], ['01012023 0900', 1657202554873902, 'Oreo Brownie', 1.0, 110, 'New'], ['02012022 0900', 16572025920151477, 'Cheese Cake', 1.0, 110, 'New']]

class MinHeap:
    def _init_(self):
        self.size = 0
        self.heap_list = []
        self.queue = Queue()

    def leftchild_index(self, index):
        return 2 * index + 1

    def rightchild_index(self, index):
        return 2 * index + 2

    def parent_index(self, index):
        return (index - 1) // 2

    def has_leftchild(self, index):
        return self.leftchild_index(index) < self.size

    def has_rightchild(self, index):
        return self.rightchild_index(index) < self.size

    def has_parent(self, index):
        return self.parent_index(index) >= 0

    def left_child(self, index):
        return self.heap_list[self.leftchild_index(index)]

    def right_child(self, index):
        return self.heap_list[self.rightchild_index(index)]

    def parent(self, index):
        return self.heap_list[self.parent_index(index)]

    def swap(self, index1, index2):
        temp = self.heap_list[index1]
        self.heap_list[index1] = self.heap_list[index2]
        self.heap_list[index2] = temp

    def insert(self, data):
        self.heap_list.append(data)
        self.size += 1
        self.heapify_up()
        print('Order added! ')
        print("Order(s): ", self.heap_list, "\n")

    def heapify_up(self):
        index = 0
        while self.has_parent(index) and self.parent(index) > self.heap_list[index]:
            self.swap(self.parent_index(index), index)
            index = self.parent_index(index)