There are 2 ways you can use templates from Canva in Pin Generator.

Option 1
1) Export any design in Canva as an SVG .
2) Create a new template in Pin Generator.
3) Add an SVG layer and upload the exported SVG file.

Option 2
1) Export any design in Canva as an image.
2) Create a new template in Pin Generator.
3) Add an image layer and upload the image file.

Both of these options will import the template as a single layer.

So I recommend leaving out any text or logo that you want to be dynamic from the Canva template. Then add those layers in Pin Generator to make the templates use dynamic layers in the template.

I know it isn't a perfect solution but I will be working on it to make it better soon.

Kind regards,
Ollie