npm i --save @jonarod/capacitor-navigation-bar
npx cap sync

import com.jonarod.capacitor.plugins.NavigationBar;

  add(NavigationBar.class);

import { Plugins } from '@capacitor/core';
import { NavigationBar } from Plugins;

...

var options = {
  bgColor: "#FFFFFF",
  theme: "light", // or "dark"
  transparent: false,
  hide: false
}

NavigationBar.set(options);