I have seen that this issue exists for a long time. Upon exporting to PDF, if you have placed a PDF inside a frame, anything outside the frame will be exported too. I believe that anything outside a frame should not be exported as it makes no sense, especially because it is exported as invisible (but still selectable). Can you fix this please?

In my example, only the image you can see was inside the frame, but other items from the original PDF were exported.

I am using Windows 11, Indesign 17.4