It is new material 3 design you can customize like this,

            LinearProgressIndicator(
                color = Color.Blue, 
                trackColor = Color.Gray, 
                progress = { 0.70f },
                gapSize = 0.dp,
                strokeCap = StrokeCap.Square,
                drawStopIndicator = {},
                modifier = Modifier
                    .fillMaxWidth()
                    .height(24.dp))