WTH input_datetime controls do not have "seconds"

Month of "What the heck?!"
1

Please add a possibility to input seconds:
image

Can be permitted by some option like “allow_seconds”:

input_datetime:
  test_time:
    has_date: false
    has_time: true
    allow_seconds: true
2

Would appreciate it, too:
https://community.home-assistant.io/t/home-connect-timer-hhss-instead-of-hh-mm/798140