In the Replicant contributors meetings of July 2019, there is a presentation on the oFono RIL: Replicant and oFono based Java RIL
The OFono RIl works1, but it's not integrated yet into Replicant and it also has several bugs that need to be fixed. You can follow along on the issue tracker here: #1958
References:
1 From #replicant, the 22 February 2020:
< scintill[m]> Hey all. I've been working again on the RIL for Note 2 LTE, and eventually other Qualcomm modems. I've got data working a few times, but it's not reliable. I'm looking into issues with audio calls too. It seems, for some reason, ofono doesn't get an acknowledgement that a dialed call has started.