Pandas dataframe - group by on two columns and get counts of repeating values

Question

Pandas 1.0.5

import pandas as pd
data = [
        [1, \'2020-01-01 1:00:00\', 5],
        [1, \'2020-01-01 2:00:00\', 5],
        [1, \'2020-01-01 3:00:00\',