Converting text to datetime.datetime object? (Error: ValueError: time data '2022-04-18T10:00:00-07:00' does not match format '%y-%m-%dT%H:%M:%S%z')

I have a datetime.datetime object that gets stored as text in a text file. Later, I have to convert that text back to a datetime.datetime object. The object is in this format 2022-04-18T10:00:00-07:00 but I'm having trouble using the strp time function to convert the text back. I tried running date_time_obj = datetime.strptime(timedatestamp, '%y-%m-%dT%H:%M:%S%z') but that format doesn't work because the time data is formatted wrong. Any clue as to what I'm doing wrong?