Of course they pull data on company devices. Parsing the data is onerous however. Regardless, no one should be complaining about their job using company hardware, aside from being unprofessional it’s obviously dangerous behavior. Nevertheless, basically everyone that was affected positively by WFH reacted negatively to the announcement, if they fired everyone that voiced dissatisfaction or discussed it then they would be firing half the company.
From experience, you are fired when you make plainly bold declarations thinking they’ll never be read. “That’s right, I’m done with this place! I’m gonna take half the calls I used to and purposely mess up cases, what are they gonna do fire me?!” Yes, yes they will. Always be exemplary in your work, but also demand the same from everyone you work with, including key decision makers.