from datetime import datetime, timedelta
datetime_str = '22/6/2022 19:50:31.019101'
date_format = '%d/%m/%Y %H:%M:%S.%f'
dt = datetime.strptime(datetime_str, date_format)
print(dt)
dt = dt + timedelta(minutes=20)
print(dt)
'''
run:
2022-06-22 19:50:31.019101
2022-06-22 20:10:31.019101
'''