Hi Vincent,
Thank you for contacting Syncfusion support.
At present, we do not have support for “Exporting the PDF document into images” in ASP.NET core platform as this implementation depends on PDF viewer control and we do not have support for PDF viewer control in ASP.NET core currently. We will consider to implement this support after providing support for PDF viewer control in the ASP.NET core.
We have added it to our feature request list and we will implement this feature in any of our upcoming releases. We usually have an interval of at least three months between releases. The feature implementation would also greatly depend on the factors such as product design, code compatibility and complexity.
Regards,
Akshaya