Hello @Handian Sudianto ,
Thank you for reaching out to the Microsoft Q&A platform. Happy to answer your question.
As far as the documentation of Microsoft Partner Center is considered, we don't have an export option for estimated usage report. However, I looked up for the command line way and see relevant commands to get the usage report through PowerShell for Partner Center
Connect-PartnerCenter
Get-PartnerCustomerSubscriptionResourceUsage -CustomerId '87045e4b-ab69-4a8f-875a-af020b383bc6' -SubscriptionId 'd2a89f2d-1aa1-4f09-bc62-cefd8d0a005c'
For the benefit of community users, adding the reference to How to get started with PowerShell
Hope this helps!
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