To put “squared” (raised exponent) in Canva, the easiest method is to simply create a new text box, type your exponent, and then resize the exponent so that it is smaller than the number raising it. Of course, clicking a button to “shrink” a number would be nice, but it’s not an option.
Here is how to go about it.
For example, if you want to write 6 squared, add a “6” in your normal font size.
Then, create a new text box (or simply copy the “6”).
From there, change the copied “6” to a “2”
Next, resize the “2” to a much smaller font size, and position it to the upper right corner of the larger number.