GroundSpawnController

public class GroundSpawnController : MonoBehaviour
{
    [SerializeField] private Transform _point;
    [SerializeField] private Transform _player;
    [SerializeField] private Transform _spawnPoint;
    [SerializeField] private GameObject _groundPrefab;

    [SerializeField] private float _distance = 20f;

    private void Start() =>
        StartDistanceChecking();

    public void StartDistanceChecking() =>
        StartCoroutine(WaitWhile(PlayerInsideDistance, Spawn));

    private bool PlayerInsideDistance() =>
        Vector2.Distance(_point.position, _player.position) <= _distance;

    private static IEnumerator WaitWhile(Func<bool> predicate, Action onComplete)
    {
        yield return new WaitWhile(predicate);
        onComplete?.Invoke();
    }

    private void Spawn() =>
        Instantiate(_groundPrefab, _spawnPoint.position, _spawnPoint.rotation);
}