To create a multiselect component in Vue 3, you can use the `v-model` directive to bind the selected options to a data property, and use the `v-for` directive to render the options. Here's an example:

```html
<template>
  <div>
    <label>{{ label }}</label>
    <select multiple v-model="selectedOptions">
      <option v-for="option in options" :value="option">{{ option }}</option>
    </select>
  </div>
</template>

<script>
export default {
  props: {
    label: String,
    options: Array
  },
  data() {
    return {
      selectedOptions: []
    }
  }
}
</script>
```

In this example, the component accepts two props: `label`, which is a string that will be used as the label for the multiselect, and `options`, which is an array of strings representing the available options.

The `select` element has the `multiple` attribute to allow multiple options to be selected, and the `v-model` directive is used to bind the selected options to the `selectedOptions` data property.

The `v-for` directive is used to loop through the `options` array and create an `<option>` element for each option. The `:value` binding is used to set the option value to the option itself.

You can use this component in your application and pass in the `label` and `options` props as needed:

```html
<template>
  <div>
    <multiselect label="Fruits" :options="fruits" />
    <multiselect label="Colors" :options="colors" />
  </div>
</template>

<script>
import Multiselect from '@/components/Multiselect.vue'

export default {
  components: {
    Multiselect
  },
  data() {
    return {
      fruits: ['Apple', 'Banana', 'Orange'],
      colors: ['Red', 'Green', 'Blue']
    }
  }
}
</script>
```

In this example, we import the `Multiselect` component and use it twice, passing in different `label` and `options` props for each instance.
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