Does the router ban really only pertain to consumer-grade networking devices?

> For the purpose of this determination, the term “Routers” is defined by National Institute of Science and Technology’s Internal Report 8425A to include consumer-grade networking devices that are primarily intended for residential use and can be installed by the customer. Routers forward data packets, most commonly Internet Protocol (IP) packets, between networked systems. ¹

> A “consumer-grade router” is a router intended for residential use and can be installed by the customer. Routers forward data packets, most commonly Internet Protocol (IP) packets, between networked systems. Throughout this document, the term “router” is used as a shorthand for “consumer-grade router.” ²

There doesn't seem to be a general ban for foreign-made professional routers, just for some Chinese manufacturers, right³?

Oh, and what does "produced by foreign countries" even mean? I couldn't find any definition. Is this meant to be the country of final assembly? Would importing a Chinese router and the flashing the firmware in the USA be sufficient to be exempt? Where is the line drawn usually?

¹) https://www.fcc.gov/sites/default/files/NSD-Routers0326.pdf

²) https://nvlpubs.nist.gov/nistpubs/ir/2024/NIST.IR.8425A.pdf

³) https://www.fcc.gov/supplychain/coveredlist