In this situation, we need to use the 'for' loop. In this loop, we need to check all the elements and add their indices if this is the element we need.

def get_all_indexes(my_list, element):
    return [index for index, value in enumerate(my_list) if value == element]

fruits = ["apple", "pineapple", "orange", "apple", "grape", "lemon", "orange"]

print(f"Indexes for 'apple': {get_all_indexes(fruits, 'apple')}")
print(f"Indexes for 'banana': {get_all_indexes(fruits, 'banana')}")

Output:

Indexes for 'apple': [0, 3]
Indexes for 'banana': []
#python