So my mobile carrier recently begun supporting WIFI calling for iPhones. After setting it up on my phone, i have found that it does not work at my school. After looking at the protocol list that can be found here I believe that this may be due to the fact that WIFI calling utilizes IKEv2 which is a very popular VPN protocol, my school maybe blocking it, in an attempt to block access to inappropriate websites. I have already tried using VPNs such as hotspot shield and shadowsocks to no avail.
So to summarize my problem: how can i force WIFI calling to utilize my VPN?
As a side note, I have already verified the functionality of WIFI calling by turning my phone on airplane mode at a nearby coffee shop, and it operated without a problem.