IOS Managed Device or Account means you’ve been hacked, your account now belongs to the hacker who has control of your credential manager, probably reconfigured your entire OS to run off of his/her “Remote Desktop Server” which moves out laterally once he has a tiny foothold. You may have clicked on an email or downloaded a fake “Chrome” application or something like that. I know this because my devices have all been compromised since 2018. Its all through use of “Sharepoint”, “Teams”, JavaScript, GoScript, and you are most likely now a part of an “Enterprise” meaning you have an IT administrator you have to get permission from to even change your firewall settings. His platforms are Azure, GitHub, and Cloudflare mostly. A good way to be sure is to check your BIOS menu when you turn in the computer. If it has been modified it will have the version of the BIOS in those settings (press F1 when starting machine), you will be able to see any sections that you can’t click on. Those have been preset by a hacker to redirect at startup to their fake OS, and usually record (audio and video), as well as keystrokes on your keyboard, to sell your information on dark web or to just eat up your data so they don’t have to pay for it themselves (gamers do this). Anyway, good luck.