I’m not sure where you’re getting that HA for v14/SNG7 is close to being released. According to this FreePBX 14 and HA they are not near that at all.
Additionally, HA is something that was setup when the systems were installed. It was an option at the install screen when you ran the ISO on the systems. This does things at the server/kernel level so it’s installed. Disabling the module is just going to make it not work but it’s still there.
Since this is a PBXact and not FreePBX (i.e. PBXact is commercial) you may want to talk to Sangoma support directly to find out what the options are because FreePBX may be what PBXact is based on but PBXact != FreePBX when it comes down to it.