android:digits="0,1,2,3,4,5,6,7,8,9,*,qwertzuiopasdfghjklyxcvbnm"

how can implement "android:digits" functionality with BasicTextField in compose

Arguably this sort of "filtering" of what input an input field can have should be handled outside of the composable in your ViewModel or something similar. Maybe some of the samples could help you? I see mentions of a text range. https://cs.android.com/androidx/platform/tools/dokka-devsite-plugin/+/master:testDat[…]/samples/TextFieldSamples.kt;l=282?q=text%20compose%20samples