DG2 refers to second-gen discrete graphics solutions from Intel, said to launch in the first half of 2021 (1H2021) at the earliest. It is rumored to have an increased execution unit (EU) count compared to its Xe Max predecessor. According to code allegedly found in a new driver from the OEM, this may indeed be the case.
https://www.notebookcheck.net/Intel-DG2-new-leaks-may-confirm-128-and-512-EU-variants.513642.0.html