Deleting the device from the Entra portal directly caused the current deadlock. While you can download the Media Creation Tool on your locked PC, running the application requires formatting a drive, which will immediately trigger the same User Account Control elevation prompt you are currently trapped by. Therefore, you must use your wife's Mac to create the bootable USB. Because the Media Creation Tool is a Windows-only executable, it will not run on macOS. Instead, when you visit the official Windows 11 download page on the Mac, Microsoft will automatically detect the operating system and redirect you to download the Windows 11 disk image (ISO) directly. You can then use a free utility on the Mac to flash this ISO file onto your USB drive, making it bootable for the PC.
Regarding a remote fix, Microsoft support does not possess a backdoor to push configuration changes to your laptop. Because the device was deleted from the Entra directory, the cryptographic trust relationship and the Primary Refresh Token were completely destroyed. The laptop is now effectively orphaned from your tenant, meaning there is no active, secure management channel for Microsoft to send an unlock command or policy update. A clean installation from a USB drive remains the only technical avenue to bypass the local security barrier and wipe the system.
Setting up the laptop for personal use first after the reset is an excellent and highly recommended strategy for a sole proprietor. During the initial Windows setup, utilizing a personal Microsoft account guarantees your user profile is created with permanent local administrator privileges. Once you reach the desktop, you can easily bridge your business environment by navigating to Settings, selecting Accounts, and opening the Access work or school menu. By signing in there with your Microsoft 365 credentials, you register the device to your business tenant. This allows you to seamlessly use Outlook, Teams, and your business licenses while maintaining absolute, uncomplicated administrative control over the hardware through your initial personal profile.
Hope this answer brought you some useful information :)
VP