I have just realised that the links in my slides document (anchor to certain slides/pages) are still present in the exported PDF but: Unfortunately they no longer link to the specific pages but to my Figma Slides file in editor mode. This means that viewers can read my notes even without an Figma-Accout.
It would be very helpful if this bug (if it is one) is fixed or at least to get more options when exporting as a PDF file such as the option ‘interactive’ or ‘non-interactive’.