What should I do if the created app is not showing on the lightning app builder?

If the app you've created is not showing in the Lightning App Builder in Salesforce, there could be several reasons behind this issue. Here are some steps to troubleshoot and resolve the problem:

1. Check App Visibility

Profile Settings: Ensure that the profiles of the users who need access to the app have the correct permissions.

Permission Sets: Verify that the necessary permission sets are assigned to the users.

2. Verify the App Configuration

App Type: Confirm that you created the app as a Lightning App and not a Classic app.

App Availability: Ensure that the app is set to be visible in Lightning Experience.

Navigation Items: Make sure that the app has navigation items defined. An app without navigation items might not appear correctly.

3. Check Component Visibility

Lightning Components: Ensure that the components you expect to see are enabled and properly configured.

Component Registration: Verify that custom components are registered and deployed correctly. Check the lightning:availableForAllPageTypes interface or appropriate interfaces for the components.

4. Review User Interface Settings

Enable Lightning Experience: Confirm that Lightning Experience is enabled for your organization.

App Settings: Go to Setup > Apps > App Manager, and review the settings of your Lightning app.

5. Check for Lightning Pages

Page Assignment: Ensure that the Lightning page is assigned to the correct app and profile.

Default App Settings: Check if the Lightning page is set as the default for the app.

6. Review Lightning Page Layouts

Page Layout: Verify that the correct page layout is assigned to the app.

Standard Components: Ensure that all standard components required for the app are present on the Lightning page layout.

7. Inspect Permission Sets and Profiles

App Access: Ensure that the app is included in the 'Assigned Apps' section for the relevant profiles and permission sets.

Tab Visibility: Check if the tabs included in the app are set to 'Default On' for the profiles.

8. Clear Cache and Refresh

Browser Cache: Clear your browser cache to eliminate any caching issues.

Page Refresh: Sometimes, simply refreshing the Lightning App Builder page can resolve visibility issues.

9. Check for Deployment Issues

Deployment Status: Ensure that all components, such as custom objects and fields, are deployed correctly.

Sandbox vs. Production: If you are in a sandbox environment, ensure that the same settings are correctly deployed to production.

10. Review Salesforce Updates

Release Notes: Check if there are any known issues or updates from Salesforce that might be affecting the Lightning App Builder.

Example Troubleshooting Steps:

Navigate to Setup: Go to Setup in Salesforce.

Search for App Manager: In the Quick Find box, type "App Manager" and select it.

Review Your App: Find your Lightning app in the list and click on "Edit."

Verify Settings: Check all settings, including App Label, App Name, Navigation Items, and User Profiles.

Check User Profiles: Make sure that the app is assigned to the appropriate user profiles.

By following these steps, you should be able to identify and resolve the issue preventing your app from appearing in the Lightning App Builder. If the problem persists, consider reaching out to Salesforce support for further assistance.