add airport express to Linksys wifi6
Is it possible to connect AE to Linksys wifi 6 and then connect printer via usb to AE?
Question marked as
In theory, it should work. It shouldn't matter as long as you configure your Linksys router to allow other network devices, which do not support native Wi-Fi 6 functionality, to connect to it. You will have to double-check your Linksys router's user guide to make sure that it is configured to support backwards compatibility with non-Wi-Fi 6 devices. (It should by default as Wi-Fi 6 has only recently been released).
With that verified, you just need to configure the Express to join the Linksys wireless network as a client. This will allow it to share a printer connected to the base station's USB port.
Ref: AirPort Express: How to join an existing Wi-Fi network in client mode - Apple Support