I've been struggling with the crop effect to recreate typewruitter effect.

My issue is: The crop effect applies to the full frame of the video, not just to the text frame.

When applying the crop effect i aplpy it to the text frame directly. In the effects control panel i have "vector motion" and "text". Vector motion is the full video frame, text is just the text frame but when i add crop effect it cannot be dragged under the "text" it adds as a 3d seperate "layer" that when wplaced above text creates the crop effect, but it applies to the full frame and not just text. It looks like it applies to the vector motion not text.
This's an issue because let's say i want to have a small text on the right side of the video frame, and for text to appear from left to right. With how it works right now there're timing dellayes and it's difficult to know when the sctual text is going to appear. Because the crop effect startes from the left side of the full frame not text farme.
I'm quite new to premier and hopefully my explenations are clear. Thank you so much in advance!