After upgrading tableau to 20231.23.0613.1501 version, we're facing issue while adding Oauth client for SharePoint.

Hi Ashish,

This is definitely something that we would recommend reaching out to the Support Team for as this may require further investigation in the Tableau Server logs.

Information can be found here regarding opening a case:

https://kb.tableau.com/articles/howto/submitting-a-case-from-the-customer-portal

Hope that helps!