Enemy Casting bar

[Fizzlemizz-azjolnerub (Fizzlemizz)]

Maybe there’s an answer here:

Enemy cast bars

There used to be cast bars under the enemy unit frame however, they’re no longer showing up for me. I know there was an option in interface > combat to toggle it but, it’s also not there anymore. Is there a way for me to turn these back on that I’m missing or have they actually been removed?