the WiFi of the mobile phone and the service opened by the computer must be on the same network, so that you can access it through the local IP, otherwise you can only put it on the external network!
does your front-end service refer to scaffolding? In this way, the IP that accesses the local computer can also be accessed under the same network.
that's all I know about your problem, and that's all I can give you.

the wifi you release must be a separate subnet segment, with only computers and mobile phones, which is actually equivalent to a peer-to-peer network. To connect with the company's internal network, a simple and rude way is to buy a tens of yuan AP, as soon as the network cable is plugged in and put a hot spot out, the mobile phone is connected to the intranet; or you can try to connect the released wifi and the intranet into a bridge, which should be in the network adapter setting, but I listen to you that the network environment is complex enough, and this may not work.

has been resolved through fiddler.

premise : mobile phone and computer are under the same wifi

when fiddler monitors mobile phone requests, the mobile phone is configured with an agent. At this time, the mobile phone can access the company's intranet, which is solved in confusion. I don't quite understand the principle. I don't know which god can explain it.