效果如图：

上代码：

<script setup lang="ts">
import { onShow } from '@dcloudio/uni-app'
import { nextTick, getCurrentInstance } from 'vue'
import ClassifySkeleton from './ClassifySkeleton'
import { isH5 } from '@/utils/is'

const instance = getCurrentInstance()
const list = ref([])
/** 每个锚点与到顶部距离 */
const listItemTops = ref([])
/** 左侧选中id */
const leftMenuId = ref(0)
/** 是否是滑动右侧 */
const isRightScroll = ref(true)
/** 锚点 */
const scrollInto = ref('')
const loading = ref(false)

const commonConfig = useCommonConfig()

onMounted(async () => {
  await getGoodsCategory()

  await nextTick(() => {
    getElementTop()
  })
})

onShow(() => {
  setTabBarBadge()
})

/**
 * 获取商品分类
 */
const getGoodsCategory = async () => {
  try {
    loading.value = true

    const data = await commonConfig.getCategory()

    list.value = data
    leftMenuId.value = data?.[0]?.id
  } finally {
    loading.value = false
  }
}

/**
 * 获取距离顶部的高度
 *
 * @param selector
 */
const getScrollTop = (selector) => {
  return new Promise((resolve) => {
    const query = uni.createSelectorQuery().in(instance)
    query
      .select(selector)
      .boundingClientRect((data) => {
        resolve(data.top)
      })
      .exec()
  })
}

/**
 * 获取元素顶部距离
 */
const getElementTop = async () => {
  const eTops = toRaw(list.value).map(async ({ id }) => {
    const top = await getScrollTop(`#leftMenu-${id}`)

    return top - 80
  })

  Promise.all(eTops).then((data) => {
    listItemTops.value = data
  })
}

/**
 * 右侧滚动监听
 *
 * @param e
 */
const onRightScroll = (e) => {
  if (!isRightScroll.value) return

  const top = e.detail.scrollTop
  const index = listItemTops.value.findIndex((item, index) => listItemTops.value[index + 1] >= top)

  leftMenuId.value = list.value[Math.max(0, index)].id
}

/**
 * 点击左侧菜单
 *
 * @param id 左侧菜单id
 */
const handleClickLeftMenu = (id) => {
  isRightScroll.value = false

  leftMenuId.value = id
  scrollInto.value = `leftMenu-${id}`
}

/**
 * 页面跳转 产品中心
 */
const toPage = (item, data) => {
  item = toRaw(item)
  data = toRaw(data)

  nav.navigateTo({
    url: 'ProductCenter',
    data: {
      id: data.id,
      name: data.name,
      pId: item.id,
      pName: item.name,
    },
  })
}

/**
 * scroll-view样式
 */
const scrollViewStyle = {
  height: isH5 ? 'calc(100vh - 94px)' : '100vh',
}
</script>

<template>
  <ClassifySkeleton v-if="loading" :skeletonStyle="scrollViewStyle" />
  <view v-else class="flex">
    <!-- 左侧分类列表 -->
    <scroll-view
      class="w-24 bg-[#f8f8f8]"
      :style="scrollViewStyle"
      scroll-y
      :scroll-with-animation="true"
    >
      <view
        v-for="item in list"
        :key="item.id"
        :data-index="item.id"
        :class="`px-2 py-4 text-sm ${item.id == leftMenuId ? 'font-bold bg-white' : ''}`"
        @click="handleClickLeftMenu(item.id)"
      >
        {{ item.name }}
      </view>
    </scroll-view>

    <!-- 右侧商品列表 -->
    <scroll-view
      class="flex-1 px-2"
      :style="scrollViewStyle"
      scroll-y
      :scroll-into-view="scrollInto"
      :scroll-with-animation="true"
      @touchstart="isRightScroll = true"
      @scroll="onRightScroll"
      enhanced
      :show-scrollbar="false"
    >
      <view class="mb-10 py-4" :id="`leftMenu-${item.id}`" v-for="item in list" :key="item.id">
        <view class="text-md mb-2 font-bold">{{ item.name }}</view>
        <view class="pt-5 grid grid-cols-3">
          <view
            class="text-center pb-6"
            v-for="i in item.children"
            :key="i.id"
            @click="() => toPage(item, i)"
          >
            <image class="w-8 h-8" :src="i.appImage" />
            <view class="text-xs">{{ i.name }}</view>
          </view>
        </view>
      </view>
    </scroll-view>
  </view>
</template>