Mobile App graphics refactoring with tablets display & landscape mode

We've developed a mobile application for mobile phone displays. We wish to extend this application to support large displays such as Tablets.
The mobile App is developed for android environments using Kotlin.

The mobile app is a point of sale mobile application that manages a shop : stock management, sales management, procurement management, product, categories and option management.

we are looking for a freelancer who can improve the application to be compatible with large displays in landscape mode.