Inside fragment::
transferWithdrawViewModel.asset.observe {
    amountInput.setMaxNumberOfDecimalDigits(it.precision.toInt())  **this line
}

AndroidView(
    modifier = modifier,
    factory = { ctx ->
        // Creates custom view
        CurrencyEditText(ctx, null).apply {

val asset by transferWithdrawViewModel.observeAsState()

AndroidView(
  // ...
  factory = { context ->
    CurrencyEditText(context)
  }
) { view ->
  // update block - this observes `asset` and runs when it changes
  view.setMaxNumberOfDecimalDigits(asset.precision.toInt())
}