Extenders come in all shapes and sizes, but what really matters is which version of Wi-Fi they support and how fast they're able to transfer data. Wi-Fi 6E is the latest version of the Wi-Fi spec, and along with more speed, it brings some interesting things to the table, such as increased throughput and enhances beamforming over Wi-Fi 5.
To use it, every link in the chain must support the new standard, from the router, through any extenders, to the client PC. None of the extenders we've tested here support the latest standard, which has yet to make its way into many homes. The next time you upgrade your router, however, it's worth looking out for.