Is it possible to enable Service Notifications without accessing settings?

Question

Im making a SoftPhone App, and right now im facing the issue that my Service Notification is not enabled by default is there a way to enable it by default or ask the user for permission to enable it without making an intent to access settings?

Edit:

My service in my manifest:

<service
       android:name=".Service"
       android:label="PBXService"/>

I start this service like this:

startService(new Intent(ACTION_MAIN).setClass(this, Service.class));

Inside the service i show the service notification like this:

mNotif = Compatibility.createNotification(this, mNotificationTitle, "Phone service", R.mipmap.ic_launcher, R.mipmap.ic_launcher, bm, mNotifContentIntent, true, notifcationsPriority);
//mNM is my notification manager.
mNM.notify(id, mNotif);

Compatibility class method:

public static Notification createSimpleNotification(Context context, String title, String text, PendingIntent intent) {
        if (Version.sdkAboveOrEqual(Version.API26_O_80)) {
            return ApiTwentySixPlus.createSimpleNotification(context, title, text, intent);
        } else if (Version.sdkAboveOrEqual(Version.API21_LOLLIPOP_50)) {
            return ApiTwentyOnePlus.createSimpleNotification(context, title, text, intent);
        } else if (Version.sdkAboveOrEqual(Version.API16_JELLY_BEAN_41)) {
            return ApiSixteenPlus.createSimpleNotification(context, title, text, intent);
        } else {
            return ApiElevenPlus.createSimpleNotification(context, title, text, intent);
        }
    }

In Api26+ Class:

public static Notification createSimpleNotification(Context context, String title, String text, PendingIntent intent) {
        Notification notif = new Notification.Builder(context, context.getString(R.string.notification_channel_id))
                .setContentTitle(title)
                .setContentText(text)
                .setSmallIcon(R.drawable.linphone_logo)
                .setAutoCancel(true)
                .setContentIntent(intent)
                .setDefaults(Notification.DEFAULT_SOUND
                        | Notification.DEFAULT_VIBRATE)
                .setCategory(Notification.CATEGORY_MESSAGE)
                .setVisibility(Notification.VISIBILITY_PRIVATE)
                .setPriority(Notification.PRIORITY_HIGH)
                .setWhen(System.currentTimeMillis())
                .setShowWhen(true)
                .setColorized(true)
                .setColor(context.getColor(R.color.notification_color_led))
                .build();

        return notif;
    }

Phone model: SM-J737A Android version: 8.0.0

I know for a fact that this works because whenever the permission is manually activated i have no issues with this.