Instead of use xml file to create shape you can use this extension to create your drawable shape at run time.

Kotlin create shape extensions

import android.graphics.drawable.GradientDrawable
import android.view.View
import androidx.core.content.ContextCompat
import androidx.core.content.res.ResourcesCompat
import androidx.fragment.app.Fragment


fun Fragment.createBackground(
    color: Int,
    corner: Int = 0,
    corners: IntArray = intArrayOf(),
    borderColor: Int = 0,
    borderWidth: Int = 0
) = GradientDrawable().apply {
    setColor(ContextCompat.getColor(requireContext(), color))

    if (corners.isNotEmpty()) {
        val newCorners = mutableListOf<Float>()
        for (cor in corners.indices) {
            if (corners[cor] != 0){
                newCorners.add(resources.getDimensionPixelSize(corners[cor]).toFloat())
                newCorners.add(resources.getDimensionPixelSize(corners[cor]).toFloat())
            } else{
                newCorners.add(0F)
                newCorners.add(0F)
            }
        }
        cornerRadii = newCorners.toFloatArray()
    } else
        cornerRadius = resources.getDimensionPixelSize(corner).toFloat()

    if (borderWidth and borderColor != 0)
        setStroke(borderWidth, borderColor)

}

fun View.createBackground(
    color: Int,
    corner: Int = 0,
    corners: IntArray = intArrayOf(),
    borderColor: Int = 0,
    borderWidth: Int = 0
) = GradientDrawable().apply {
    setColor(ContextCompat.getColor(context, color))

    if (corners.isNotEmpty()) {
        val newCorners = mutableListOf<Float>()
        for (cor in corners.indices) {
            if (corners[cor] != 0){
                newCorners.add(resources.getDimensionPixelSize(corners[cor]).toFloat())
                newCorners.add(resources.getDimensionPixelSize(corners[cor]).toFloat())
            } else{
                newCorners.add(0F)
                newCorners.add(0F)
            }
        }
        cornerRadii = newCorners.toFloatArray()
    } else
        cornerRadius = resources.getDimensionPixelSize(corner).toFloat()

    if (borderWidth and borderColor != 0)
        setStroke(borderWidth, borderColor)

}