Why can't I draw new objects?

Question

Java

I am writing my project for release. The foundation is already there - the tile system, the GameState system, etc. But when it came to creating players, nothing really came of it. I must say right away that I am not so familiar with the framework.
Here is the main, so to speak, detail of my game:

public class MyGdxGame extends Game {
    
    public static SpriteBatch batch;
    Texture img;
    public static final int V_WIDTH = 400;
    public static final int V_HEIGHT = 208;
    public static final float PPM = 100;
    private GameLoader load;

    


    @Override
    public void create() {
        batch = new SpriteBatch();
        load = new GameLoader(this);
        setScreen(load.getCurrentState()); // тут, как я понял, закрепляется основная сцена на фрейм

    }

    @Override
    public void render() {
        super.render();
    }

    @Override
    public void dispose() {
        batch.dispose();
        img.dispose();
    }

}

But now let's move on to the main thing, to the creation of enemies. First I want to show how I created the player:

public class Player extends Sprite {

    public World world;
    public Body b2body;

    public Player(World world) {
        this.world = world;
        definePlayer();
    }


    // create player
    public void definePlayer() {
        BodyDef bdef = new BodyDef();
        bdef.position.set(32 / MyGdxGame.PPM, 200 / MyGdxGame.PPM);
        bdef.type = BodyDef.BodyType.DynamicBody;
        b2body = world.createBody(bdef);

        FixtureDef fdef = new FixtureDef();
        CircleShape shape = new CircleShape();
        shape.setRadius(5 / MyGdxGame.PPM);

        fdef.shape = shape;
        b2body.createFixture(fdef);

    }

    // для реализации света
    public Body getB2body() {
        return b2body;
    }
}

I have a PlayScreen class . There I launch the first level: I draw the player, the map, and now, I would like, the enemies. But for some reason, drawing enemies in a similar way with the player does not work out.
How I create a player: And rendering: If you don’t understand something, then here is a link to the github (to a specific class where it all happens) That is, with such a record, I don’t get the result that I want to achieve:
player = new Player(world); // create player
b2dr.render(world, gameCam.combined);

Enemy enemy;
...
...
enemy = new SimpleEnemy(world);

Here is the Enemy class which is similar to the Player class

public abstract class Enemy extends Sprite {

    World world;
    Body b2body;

    public Enemy(World world) {
        this.world = world;
    }

    // create enemy
    public abstract void defineEnemy();

    public World getWorld() {
        return world;
    }

    public Body getB2body() {
        return b2body;
    }
}

And SimpleEnemy :

public class SimpleEnemy extends Enemy {


    public SimpleEnemy(World world) {
        super(world);
        defineEnemy();
    }

    @Override
    public void defineEnemy() {

        BodyDef bdef = new BodyDef();
        bdef.position.set(32 + 10 / MyGdxGame.PPM, 200 + 10 / MyGdxGame.PPM);
        bdef.type = BodyDef.BodyType.DynamicBody;
        super.b2body = super.world.createBody(bdef);

        FixtureDef fdef = new FixtureDef();
        CircleShape shape = new CircleShape();
        shape.setRadius(20 / MyGdxGame.PPM);


        fdef.shape = shape;
        super.b2body.createFixture(fdef);

    }
}

Thank you in advance for your help!