Adobe Fresco Won’t Export PNG with Transparent BG

I'm using the current version of Adobe Fresco that I downloaded yesterday (05-25-24) onto my new 13" M4 iPad Pro 1TB. I also use Adobe Fresco on my 12.9" M2 iPad Pro and having this same issue on that one too. I did a test draw of a circle using a vector brush (round). I set the file size to 8192 x 8192 pixels and print size 4000ppi. I made it this large so that when it's exported as a png (no option to save as an svg in Fresco), the quality won't diminish too much when it's expanded. I'm drawing characters for animations and don't want the drawings to pixelate when I put them into the video software I use and expand them. However, after I Published and Exported the test pic, it exported with a white background, like a jpg. I went into the Fresco app settings and set the quick  'Export As' settings to png but it's still saving the image with a white bg. I even set the art board to transparent bg. What's going on with the Adobe Fresco software?