Onedrive security breach

Dear All, I am posting this message because I would like to report an important security problem concerning OneDrive and other Microsoft applications that can be installed on a mobile phone, in fact I have just lost one of my mobile phones that was connected to my personal onedrive with the mobile app and I have just noticed that I cannot remotely disconnect my phone from its access to Onedrive or my Microsoft account under any circumstances, which I would say is an extremely important security breach. What would you recommend. Cordially.