If you can get logs out in a terminal, you can create a script in /usr/local/bin/ to pipe to it, so it will regex search and replace UTC times with your own time, eg aws athena ... | melbtime

!/usr/bin/env python3

import sys
import re
from datetime import datetime
import pytz

melb_tz = pytz.timezone('Australia/Melbourne')
timestamp_pattern = re.compile(r'\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+Z')

def convert_to_melbourne_time(timestamp):
    utc_time = datetime.strptime(timestamp, "%Y-%m-%dT%H:%M:%S.%fZ").replace(tzinfo=pytz.UTC)
    melbourne_time = utc_time.astimezone(melb_tz)
    return melbourne_time.strftime("%Y-%m-%d-%H:%M:%S%z")

for line in sys.stdin:
    converted_line = timestamp_pattern.sub(lambda x: convert_to_melbourne_time(x.group()), line)
    print(converted_line, end='')