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.
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.