I have applied through the Forms Pro page at https://formspro.microsoft.com/en-us/ - I get a message telling me that I already have a license for Microsoft Forms Pro and I can see in my Account Subscriptions that I have:
"Forms Pro Trial Forms Pro Flow for Forms Pro Common Data Service"
But when I follow to the next page I get re-directed to the old Forms Designer, not the preview for Forms Pro.
@Harry8665 sorry about that. At times there could be an issue related to cached licenses. If you have confirmed that you have license to Forms Pro, could you try again? If you are still facing an issue, please email me or Welly at firstname.lastname@example.org; email@example.com.