How can I verify that my imported or cloned new form also still has my Square Payment properly linked?

You can check if Square is Integrated correctly in your form by going to your Payment Settings.

Select your payment field and click on the wand icon to open the Payment Settings.

In your Payment Settings click on the gear icon to open the Square Integration.

In you Square Integration click on Connect with Square.

Please give it try and let us know if you have further questions.