The feeling still exists, but I can observe it and can run a secondary self-introspection loop to unpack that feeling, and often dig deeper and resolve where they feeling is coming from.

Another way of putting is that I'm self aware that the "qualia" of feeling angry is being projected into my conscious experience as a token, rather than simply experiencing "feeling angry" qualia.

I liken it to being able to set a breakpoint on my emotions, and then single step through the root cause of that emotion.

I seriously didn't have that functionality in my brain before that hero dose trip (even after doing many years of meditation).

Your second sentence is more on the right path (speaking for myself at least). It's about labeling and observing the literal physiological sensation that is occurring in your body and choosing how to react vs. identifying strongly with the current emotion and reacting.

Easier said than done, of course!

And mindfulness meditation is training yourself to detach your conscious sense of self from those physiological sensations, noticing but not reacting to them at all!