'Can I use react native to build a app with another frontend?

Sorry if there is already a similar question with answer and if there is, put the link here so I can reach it.

I'm having a difficuty these days... I was told to create a new integration with a terminal called TERMINAL SMART G800 from GERTEC. Here in the company we are usually use Cordova but it is deprecated and abandoned so I decided with my team to do this with React Native.

I started the project but I'm finding some difficulties and I can't find anything in Google... The thing is, in the react native site, they have a tutorial to use react with an exsting andrid app but I didn't see nothing related to using react native to build an apk using an existing frontend project. I mean, like if I wanted to use a responsive site, made with HTML and CSS to build an apk. But it seems that I need to use the react tools to do this. I'll need to recreate my app entirely. Can someone help ?

FrontEnd structure: enter image description here

React excample sructure: enter image description here