No. Enrolling in ABM is effectively nothing more than completing the form online and validating that you are a legal business entity. If you want to get devices to be automatically associated to your ABM, then you must buy Apple products in a specific way. A way that can prove chain off custody (your legal business purchased and owns the equipment). Retails sales do not qualify, including just walking into the Apple Store and making a purchase. Retails purchases do not participate in the chain of custody as they are not a trusted link.
If you are already working with an Apple Store, you must ask to work with the Apple Business Sales Team. Inform them that the customer has ABM and that all future purchases are to be linked to the ABM. Provide them with your Org ID.
If you are working with an Authorized Reseller, you must confirm that the reseller can participate in the DEP program. Provide them with your Org ID and they will provide you with their Reseller ID. Enter the Reseller ID into the customer's ABM.
Resellers can act as a trusted link in the chain of custody. This includes cellular providers like AT&T and Verizon (naming a few in the US). Work with the business team of the cellular providers to ensure that you have their reseller ID and they have your Org ID. That way, phones can be automatically assigned as well.
Hope this helps. If you continue to make retain purchases, the devices will all need to be unboxed, powered on, side loaded using Configurator, and then erased again after properly assigning the device to your MDM's prestage. (Using Configurator on iPhone allows assignment to an MDM, saving a step).