Hello Team,
Here is how you achieve this.
Here is a simple form I created just so I can show you the solution -
I have a simple date picker in this.

My flow-
Step 1 and 2 - When a new response is submitted, get response details (self explanatory)

Step 3 - Condition to check if submission date is equal to today's date
formatDateTime(outputs('Get_response_details')?['body/submitDate'],'yyyy-MM-dd') is equal to Date to be compared against submission

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