Adobe Acrobat useage on US Government Forms

I just downloaded Adobe Acrobat-Version 21.10.00.  I am trying to download a document from the US Government-Customs related to a Declaration known as Form 6059B.  When I select the form, I receive an immediate "pop-up" stating that Adobe Version 8 or higher is required.  I am using a 5th Generation iPad.  I signed up for the Premium Version of Adobe Acrobat.  When I select the government form, should it not immediately open the document in Adobe?  What am I doing wrong?  Your assistance is appreciated!  Mike