Yup every item, event or artefact that cause a tf grants points toward that tf.
I'd like to second this. After completing 3 whole runs where I picked up every tf item, stepped on every magic circle, and took every cursed object offered, I only have about 19-21 TF mastery points for each of the starting species. Not to mention the dozens of runs where I failed before completing it.
It feels near impossible to level these masteries, and very unclear on how you are supposed to advance them.