How to set a policy on the tenant so that passwords expire after a given number of days (e.g. 180 days) using either the Graph API or C# SDK?

I can see there is a Graph PowerShell command Update-MgDomain to do this (documented here):

Password expiry duration (Maximum password age) Default value: 90
days. If the tenant was created after 2021, it has no default
expiration value. You can check current policy with Get-MgDomain. The
value is configurable by using the Update-MgDomain cmdlet from the
Microsoft Graph module for PowerShell.

But I can’t find the same functionality in Graph API Reference. Is there a way to do this using the API or using C# SDK?