check out this comment by Philippe / Kariboo92 in Aug 2019 on FreeWifi. The issue is unsolved, an open implementation still missing?
he looked at how Samsung implemented EAP-SIM, using some wpa_supplicant compile options and a smartcard 3rd party library (libpcsclite) to interface with the SIM. It’s the same what a user did on a normal Linux to solve it. It links an Android smartcard project that has precompiled packages, as I don’t know if psclite could talk to the HAL for the SIM of an Android. A android SE thread should be updated if anything new comes up.