From another article about this topic:

This leads to the question of what exactly the FCC means by consumer-grade routers.

In September 2024, NIST submitted proposals to strengthen the – undeniably modest – IT security of routers (NIST IR 8425A). It states: “Routers forward data packets, most commonly Internet Protocol (IP) packets, between networked systems.”

This encompasses a wide range of devices, from WLAN repeaters to smartphones

So new smartphones are banned too?