@Panda-na @Probably9857
I believe that ProtonVPN's notification that displays data usage will display all data used by the phone regardless of whether it is used by the profile/VPN in question or another profile or private space.
There is a technical explanation for this which unfortunately I am not qualified to give. It is vaguely something to do with the fact that active VPN apps have access to the data usage of the whole phone and ProtonVPN have not set up their data usage monitor to account for the fact there may be other profiles/spaces and so just show the entire phone's data usage.
I apologise if I got anything wrong there or just generally butchered the explanation. Perhaps someone with a better understanding of this will explain better