i'm not saying it couldn't be improved and yes it can be hard to see in the log but the OP says its not working at all for them so i just want to clear up that it IS working... at least for me
personally i agree it could be added to the reaction UI so people can have a say and 'see' it works but the UI has lots of issues which need fixing before the deadline and perhaps a 'currently working' effect for a single sub class isn't the most important place to fix first... i mean you could just mod it but i don't have any say in the matter and Larian will do whatever makes sence to them at the time
Honestly I just assume that all the stuff on toggle will be added to the new reactions UI or already has been in the full game framework. I think they just really wanted to showcase it for us which is why we only have it for counterspell, hellish rebuke and paladin smites.