Why can't I choose Square in my payment form?

Why can't I choose Square in my payment form? It only allows me to choose PayPay.

Can you please tell us the URL link of your form.

We need to check on the form to determine the cause of issue.

On the other hand, if you were already using Payment field on your form, the other payment fields will be disabled. You will need to remove first the existing payment field on the form before you can add a new payment field for integration.