Pointing PAC(Proxy Auto Config) as an option

[ohnggni]

When I use this proxy server in my iOS device, especially for cellular mode, it's unable to point PAC(Proxy Auto Config) file. We can enter only server and port. (Generally, in iOS12, we have to create APN profile in the site like as https://iphone.flexserve.net/select)

Is it possible to integrate the function(or option) pointing a PAC file? Or, is it possible to implement the feature by entering "whitelist or blacklist" into a config file, so that we can bypass some domains or urls?