This module enables the VoWiFi options by editing build.prop.

Important: VoWiFi will not work if your carrier doesn't support it, even if you install this module.

XDA Thread: here (Original Developer's Thread)

persist.dbg.allow_ims_off 1
persist.dbg.volte_avail_ovr 1
persist.dbg.vt_avail_ovr 1
persist.dbg.wfc_avail_ovr 1

05-07-2020: Initial Release