Why is Laravel not loading css file from vue child component?

Question

Vue.js

Friends, hello everyone.
Laravel has a.vue component. I insert another component into it, here is a piece of the insert:

import DateRangePicker from 'vue2-daterange-picker'

    export default {
        components: {
            DateRangePicker
        },

In the inserted component, there is an import of the css file:

<style lang="scss">
    @import '../assets/daterangepicker.css';
</style>

After building via npm run dev, data from the daterangepicker.css file does not get into css..
Packages "node-sass", "sass-loader" for npm are installed, scss styles are read correctly..
Tell me, what did I miss? Maybe something in webpack.mix.js needs to be added?
Thank you very much in advance!