My college has two wifi networks: eduroam, which uses WPA2 Enterprise authentication and is meant for all of our computers/phones/tablets/etc., and open, which has no authentication and is meant for devices that can't handle WPA2 Enterprise, such as smart TVs and Amazon Echoes. WPA2 Enterprise-capable devices literally aren't allowed to use open, they won't be allowed to connect to the Internet from that network.
My question is, how can I teach my Apple Watch that open is a usable network, given that I can't put my iPhone on open?