Although this 8-inch tablet is not official yet, a T-Mobile support page for it is already live and reveals most specs and features - a 1.4 GHz octa-core processor, 2 GB RAM, 32 GB storage, Android 7.0, as well as a docking accessory.
https://www.notebookcheck.net/LG-GPad-X2-8-0-Plus-leaks-online.240408.0.html