Computer locked even after being removed from Apple Business and Mosyle

The company I used to work for let me keep an old Macbook Pro that used to be connected to the company's Apple Business account and Mosyle. They removed the computer connection to both of those services, but when I try to reboot, a password prompt shows up and I'm not quite sure what it's asking for - since it's been disconnected from the 2 services mentioned above.

Anybody have any ideas how to do a complete factory reset on the MBP?