Hey I noticed while playing through the game I have been notified of disapproval multiple different aways in this game.
First way is top left of the screen which I'll call Dragon Age approval. That's what I normally get.
Second way, was during saving a gnome from goblins Wyll knew one of them and wanted the goblin alive. I get a pop up in the middle of my screen to dismiss letting me know he disapproves. (Also this seems to be glitched in my game. If I let him talk we get information, and then he mentally asks me to kill the goblin. If I do, I can then talk to him afterwards but he reacts as if I had killed the goblin. Not sure if this is acting properly.)
Third way is I saw a text very briefly I almost didn't catch it where Shadowheart had a -5 if I sleight of handed the Selune items out of the box that takes an incantation after revealing that she is a worshiper of shar and of course wouldn't like Selune stuff. (This is golden text above the player much like how it was presented in divinity. Not sure if it's just coded differently or if you are purposefully having the intent to use different notifications to signal approval / disapproval.
The different types that have popped up thus far I've only noticed as being disapproval thus far. Hope this helps with specific examples! :)