Attribute Map: Return corresponding timestamp to max value

Configuration
1

Hey there,
I’m trying to create a notification stating the timestamp when a certain max value is reached.
Attribnute looks like this:

state_class: measurement
data: 
- datetime: '2024-08-21T19:00:00.000Z'
  value: 24.1

This is what I’ve managed, so far:

{{ as_timestamp(strptime(state_attr('sensor.gust','data')[:12] |
    map(attribute='datetime') | list | max, '%Y-%m-%dT%H:%M:%S.000Z')) | timestamp_custom("%H:%M Uhr") }}

That way I always get the latest timestamp. Is there a way to map the value attribute and return the corresponding timestamp instead?

Thanks a lot!