Hi there,
I would be happy to switch you from your ExportPDF subscription to the Adobe PDF Pack subscription, which does allow you to convert from PDF to PowerPoint (not Publisher). There is a difference in price, though, so please take a look at let me know if you'd like me to switch you over: https://new.acrobat.com/en_gb/products/exportpdf/subscribe.html
I look forward to hearing back from you.
Best,
Sara