Sharing data across components is one of the core functionalities of VueJS. It allows you to design a more modular project, control data scopes, and create a natural flow of data across your app. Unless you’re creating your entire Vue app in one component (which wouldn’t make any sense), you’re going to encounter situations where you need to share data between components. By the end of this tutorial, you will know three ways to get this done.

https://www.smashingmagazine.com/2020/01/data-components-vue-js/