Amazon has opened pre-orders for the upcoming TP-Link Deco S4 2-Pack Whole Home Mesh WiFi System. The bundle can cover up to 3,800 sq. ft. and up to 75 devices. If you are interested, you can pre-order with the following link from the online retailer:
According to the product page, the 2-Pack will be coming out on July 13, 2020, on Amazon in the U.S. region. You can find more details, including the specs, on the official TP-Link website. You can see how the Deco S4 stacks up against the Deco M4 with this article.