If you have FaceID enabled, it will require that to disable lockdown mode (and I already explained the loop about how lockdown mode disables biometric auth like Face ID). I can get into the phone with my pin just fine, but the phone is still locked down. When lockdown mode disables biometric auth, I couldn’t get into bank, brokerage or any app requiring that auth.
Maybe I’m just crazy because it seems like a ridiculous oversight.