Greetings from the FUTURE’s FUTURE future!
I have found a bit of a hack since I didn’t just need the opacity revealed from the center. I needed the words to be typed from the center.
I started with the Word Processor effect preset.
At the start where no text is typed, I animated the text position to the center, then once it’s done being typed, the text moves left, staying centered as it get’s typed.
Then I used posterize time with a framerate of 4 to get it synced.
Voila!