With Apple ending support for macOS Server we intend to use Soti to manage all our apple devices but I have hit a wall

We have around 400 devices that need to be enrolled in Soti. Doing it by hand is gonna take forever

Does anyone know of a solution to automatically enroll these devices from Profile Manager to Soti? Keep in mind that I dont have these devices listed in Apple Business Manager because I havent bought them from licensed apple resellers