Sure — you use the text tool in AE? I’m kind of sure that these texts are vectors… so they can be scalled to any size w/o loss.
However, if I’m wrong you can just change the font size to meet your needs.
OH — wait… I think I know what you are asking. But again, it will rely on the assumption that text is vector. In your new larger comp bring in the motion graphics. With it selected in your time line you’ll notice the box around it is too small for the new size.
Click the ARROW tool or hit V and then resize the bounding box with the arrow.
I think that will get you where you want to be. Make sure the resolution line is the solid / and not the broken \.
CaptM