@Jason Wong Thank you for reaching out to us. As I understand you are looking to customize the password change page ( https://account.activedirectory.windowsazure.com/ChangePassword.aspx ) as per your organization polices.
Researched on this ask and checked internally with my teams as well, we have received this feedback from many customers, engineering team is reviewing this ask, however there is no ETA for this feature request.
Already there is a feedback requested for the same on https://feedback.azure.com/d365community/idea/d88fa74c-dd25-ec11-b6e6-000d3a4f06a4 you can upvote/add the comments to the same.
Please remember to "Accept Answer" if answer helped, so that others in the community facing similar issues can easily find the solution.