Hi,

There are a few possible reasons why your newly created module is not appearing in the app list after clicking "Update Apps List". Here are some troubleshooting steps you can try:

1.Check the module's dependencies: Make sure that your new module does not have any missing dependencies or conflicting dependencies with other installed modules. If there are missing or conflicting dependencies, Odoo may not display the module in the app list. You can check this by reviewing the "depends" section in your module's manifest file.

2.Check the module's installation status: Go to the "Installed Apps" menu and check if your new module is listed there. If it is listed but not installed, try installing it manually from there.

3.Clear browser cache: Sometimes, the browser cache can cause issues with displaying updates in Odoo. Try clearing your browser's cache and refreshing the page to see if the changes take effect.

4.Check server logs: Check the server logs to see if there are any errors related to the module installation. You can access the logs from the command line or through the Odoo interface in the "Settings" menu under the "Technical" section.

5.Restart Odoo server: If none of the above steps work, try restarting the Odoo server to see if the changes take effect.

Regards.

Try that:

You must restart your Odoo Server everytime you make changes in your apps at addons' directory.

Using Debian:

 - Go to your terminal and type 'workon ', and than type 'systemctl restart odoo'.

 - Now you can 'klick in the left top Corner Main Menu, APPS and than UPDATES'.

check folder security and path