How to configure Policy-based routing for netflix in China with USB-tethered iPhone

Hello,

I have a Chinese ethernet and a tethered iphone with esim connected to my router (gl-be3600, firmware 4.8).

How do I configure it in a way that appletv or netflix requests (preferably by domain name) go through the tethered iphone and not through the chinese wan?

Google gives me outdated or incorrect results. For example, after installing the pbr, I still don’t see the tethering interface (in luci) in the dropdown when I try to add a new rule.

Any help is greatly appreciated. Thank you in advance.