Had the same issues as discussed here. Bluetooth connected Dualshock 4 worked fine last night and now after the 7.1 Update not detected at all by the game. Controller works perfectly for other games as well as games on Steam.

- Windows 10 with current updates
- Square launcher without steam

Troubleshooted restarting game, pc, wired connection for controller. Nothing worked

Turned on DS4Windows and finally solved the issue. Seems like FFXIV is having trouble recognizing DS4