Embedding vue.js widgets in html tags?

Question

PHP

html is generated on the side of the microframework in php, not Laravel.
The task is to create widgets that are inserted into the php template and output as hrml.

How to do it in component mode?

I'm just learning VUE, as far as I understand, if there is an assembly through components, the application works like a SPA and all content is created through the App file and, in fact, index.hmtl is only needed to start.

As I would like to do, there is <div id="app">inside it what php generated and interactive widgets are inserted with tags<tag></tag>