Forms - Form still submits successfully although a required field hasn't been filled

Hi guys!
I’ve created a form in my project, there are 3 fields and one of them is a dropdown. All are required but it’s still possible to submit the form successfully without filling selecting an option from the dropdown… I think it’s registering the ‘Select Option’ Placeholder as a valid option… Has anyone encountered this issue before? And do you have solutions please?
Something else that is happening is that the form itself is called ‘Form-Register-App’ and its not showing in the Project Setting Forms…

Here’s a screenshot of the form:

And here’s the link

Thank you so much!!!