Hi there,
Thanks for reaching out. We understand your concern and are here to help.
Which version of Photoshop on iPad are you using? What modifications do we want to make? We directly can't curve the text in Photoshop on an iPad; to do that, we need to convert the layer. Please check this video tutorial for the detailed steps: https://www.youtube.com/watch?v=QbONrz8VreY.
Let us know if this helps.
Thanks.
Ranjisha