Hello @Vivek Komarla Bhaskar ,I'm not sure why your client does not return 200 with Response action in Logic Apps, but if they need to change HTTP status returned by Logic Apps, they need to use policies to modify HTTP status returned from the backend Logic Apps.
Here is a sample code. This code changes HTTP status to 200 if response status code is equal to 202.
<outbound>
<base />
<choose>
<when condition="@(context.Response.StatusCode==202)">
<set-status code="200" />
</when>
<otherwise />
</choose>
</outbound>