As a non-US citizen, how can I be sure that all non-Huawei equipment is free of back doors, data-exfiltration and forwarding capabilities excluding the lawful interception feature set?
So it's something between a slippery slope and futile attempt unless you have a multi layer security from different vendors or roll your own defenses.
NSA, OTOH, intercepted the switches which would isolate high security networks (red/black separation) and bleed sensitive information with these enhanced hardware.
Packet capture from the edge is where I'd start.