Does it work if you have a work vpn like Cisco Anyconnect or Cato. Proxyman does not with those Vpns :(
From a PC/Mac, if you can reconfigure your browser to proxy traffic via Pākiki, it should work with them (and then subsequently route traffic over the VPN).
Unfortunately I'm not sure what the network routing/proxying behaviour is on mobile when you have a VPN like those configured, but my assumption is that it probably wouldn't work.