I have updated my company's Default Working Hours, but I don't see the change reflected anywhere.

The company-wide Default Working Hours are applied only when a new team member is created. Updating the default will not change the working hours for existing team members.

This design allows individual working hours to differ from the company default, ensuring flexibility for each team member.

If you need to update working hours for multiple team members at once, you can do so via the API using the /v2/persons endpoint. You can find the documentation here: Forecast API – Persons Endpoint