PDF to PowerPoint makes one slide per page so you can drop the deck into PowerPoint or Google Slides.
Slide design is not preserved. Treat the file as a starting point, then restyle it. Scanned pages stay images, not editable text.
Questions
Will animations and speaker notes carry over?
No. The export is one plain slide per PDF page.
Does the PDF leave this device?
No. The deck is built in the browser and downloaded from this tab.