Lightroom Ipad and Texture tool brush out

Hey guys,

I am working on my Ipad Pro and Lightroom has the Texture feature. I used it on Camera Raw and photoshop for skin smoothening. I would duplicate a Layer in Photoshop and open Camera Raw with thst Layer, use texture and go back to Photoshop and brush out everything but the face.

I can't find how to do this brush out in Lightroom Ipad. Once I use texture, it is applied to the whole photo but I can't brush out

Thanks for thr help