Help with new (default) templating in 2021.10

Configuration
95

Se the example here: https://community.home-assistant.io/t/updating-templates-with-the-new-default-values-in-2021-10-x/346198#3-arguments

# returns time @ 10 am, if fails returns 0
{{ strptime("10:00", "%H:%M", 0) }}