Not sure which update worked, but I did an Intel Rapid Storage Technology Driver update and a System BIOS - 1.10.0 update and the download speed is now 508.3 Mbps and the upload speed is 310.9 Mbps.
My Dell 7386 laptop with an Intel AX200 has much slower download speeds than are available on two different Samsung Galaxy S10e cellphones. All devices are connected via Wi-Fi to a TP-Link AX6000 router. The router's connection to the ISP tests out at a 501 Mbps download speed and a 500 Mbps upload speed. The S10e cell phones test out at a download speed of 472.8 Mbps and 482.8 Mbps, and upload speeds of 147.3 Mbps and 168.8 Mbps. The laptop tests out at a download speed of 113.3 Mbps and an upload speed of 296.5 Mbps. They are all connected to the router on the 5 GHz radio using the AX protocol. All devices are in the same room, with the laptop being a couple of feet closer to the router than the cell phones. Shifting positions of the devices in the room has no impact on the speed tests. The AX200 has driver version 21.90.3.2. Given these parameters, it would seem the issue is with the AX200 or 7386. Any recommendations?
Inspiron 7386 with AX200 network adapter