Vikram Sudhini Thanks for posting your question in Microsoft Q&A. The current implementation in Azure API Management does compare the property name in case sensitive way, and unfortunately, there is no config to change this behavior. Interestingly, I found Add support for comparing property names case-insensitively during validation PR merged with this ask in Newtonsoft.Json.Schema - .NET implementation.
If you are interested in this feature in APIM, I suggest you submitting it via https://aka.ms/apimwish and others with similar interests can upvote it too. This will help our product team prioritize the features and I will also pass your feedback internally.
I hope this helps and let me know if you have any questions.
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