I found I must zoom out the PDF so all area was displayed on the screen before Siri AI could scan the area and outline information from the PDF. If we have two pages, one page would be omitted by Siri AI. I am not sure if this the normal of Siri which it is supposed to be. Screenshot below. PS: Zooming out makes my human eyes unusable.

I am on macOS 27 Developer Beta 3 but I think this issue also exists on other public released macOS systems. The problem is, if I enable PF (via sudo pfctl -E), the iCloud private relay becomes unavailable. This issue was confirmed after I disable PF, after which private relay turned green (functioning normally) immediately. Therefore, I wonder is there anyway to let the both exist concurrently? Thanks.