How can I stream Netflix to a TV using the lightning/usb cord?

You don’t.

Ask Netflix, since they disable it.

You will need to purchase Apple's Official Lighting to Digital AV adapter directly from Apple ( to avoid counterfeit adapters ) and a good quality HDMI TV cable, if you own a flat screen TV with HDMI ports.

https://www.apple.com/shop/product/MD826AM/A/lightning-digital-av-adapter

Best of Luck to You!