rememberPagerState

@Composable
fun rememberPagerState(
    initialPage: Int = 0,
    initialPageOffsetFraction: @FloatRange(from = -0.5, to = 0.5) Float = 0.0f,
    pageCount: () -> Int
): PagerState

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.aspectRatio
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.pager.HorizontalPager
import androidx.compose.foundation.pager.PagerState
import androidx.compose.foundation.pager.rememberPagerState
import androidx.compose.material.Text
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp

// You can use PagerState to define an initial page
val state = rememberPagerState(initialPage = 5) { 10 }
HorizontalPager(modifier = Modifier.fillMaxSize(), state = state) { page ->
    Box(
        modifier =
            Modifier.padding(10.dp).background(Color.Blue).fillMaxWidth().aspectRatio(1f),
        contentAlignment = Alignment.Center,
    ) {
        Text(text = page.toString(), fontSize = 32.sp)
    }
}