Make multiple pages in ReactJS without using react-dom-router

I am a begginer in ReactJS web development and I wanted to ask, how can I make multiple pages in ReactJS (for example if I click on a button called "About me" that it will redirect to a different part of the whole site, for exaple example.com/aboutme) without using react-dom-router?

I don't want to change much in the codes because I already use my App.js as the main page.