Hello @Vijayarajan Vivek - Thanks for reaching out.
I tried reproducing your issue, and I was able to select the Resource Type and Resource without any issues.
From the 1st screenshot, for Resource Type please choose Microsoft.insights/privateLinkScopes.
And then you will be able to see the Resource you created as part of Azure Monitor Private Link Scope.
Here is what I created:
Hope that helps.
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