Hello @Sukumar Vinnakota ,
Thanks for the question and using MS Q&A platform.
Unfortunately, you cannot disable or stop Azure Purview account.
Note: Azure Purview is always on and you can only stop paying for Purview if you delete the Azure Purview account.
I would suggest you to provide feedback on the same:
https://feedback.azure.com/forums/932437-azure-purview
All of the feedback you share in these forums will be monitored and reviewed by the Microsoft engineering teams responsible for building Azure.
Hope this helps. Do let us know if you any further queries.
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