The 2021 Inspiron 13 / 14 / 15 Intel laptops feature the Core i5-11300H and i7-11370H CPU options, up to 16 GB of LPDDR4x RAM, Intel Optane Memory H20 modules (only for the 13-inch model), up to 2 TB of NVMe SSD storage, Nvidia's MX450 dGPUs and up to 2x Thunderbolt 4 connectors.
https://www.notebookcheck.net/Dell-refreshes-the-Inspiron-13-14-15-models-with-Tiger-Lake-H-CPUs-and-Nvidia-MX450-dGPUs.531052.0.html
The date indicated has arrived, and the new models cannot be purchased yet.
Dell support says they don't know when it will be available.