Problem when exporting a dashboard (custom widget not displayed)

Description

I have developed a numeric widget in the Monday Developers Center, and it is working 100% as expected inside the dashboard. However, when I export the dashboard to PDF, the widget does not display its value — it looks empty.

What are you trying to achieve

My question is: do I need to develop this export functionality myself, or is it a native feature of Monday that I should connect or enable in some way?