I took notes during the "Manage Devices with Apple Configurator" session. If interested, please see the attached "Notes from session":
For the session video, please see the following link: https://developer.apple.com/wwdc21/10297
Notes from Manage Devices with Apple Configurator (Wednesday, June 9th 2021)
Your notes say that only Apple Silicon and Intel T2 hardware can be enrolled in ABM/ASM using Apple Configurator for iPhone, but the actual transcript says nothing beyond "can assign Mac computers running macOS Monterey." While I understand why you'd need Apple Silicon or a T2 for the Revive and Restore functions, do you need them just to enroll?