There is the law and then there are employment contracts. Sometimes these things overlap, intersect or contradict in interesting ways.

I dont think I have ever worked under an IT policy that was anything but 'for work use only' - although that didnt stop me from taking great pleasure at seeing how many work emails were used to sign up for sugardaddie etc whenever they leaked. I was never too fussed - having two phones, two emails, two laptops etc doesn't bother me in the slightest. You lose access to the work phone number / email / storage when you leave anyway so it's really of no use.

I have even come to like the physical separation of work and personal, there are times each needs more than 50% of my attention.