My custom module suddenly stopped appearing in the admin panel and in app/etc/config.php

Question

I'm in development stage and I have a custom module that used to be showing up in the admin panel. Yesterday it suddenly stopped showing up in this panel. I don't see my custom module in app/etc/config.php, which sounds like it's not being built. I removed the custom module from my VSCode solution. Then I added it back in and ran from terminal, php bin/magento setup:upgrade When running this command it shows me all the modules its updating and mine is not listed.

magento-store/src/app/code/Cellularisrael/Mobileplans/registration.php

 <?php
\Magento\Framework\Component\ComponentRegistrar::register(
\Magento\Framework\Component\ComponentRegistrar::MODULE,
'Cellularisrael_Mobileplans',
__DIR__
 );

magento-store/src/app/code/Cellularisrael/Mobileplans/etc/module.xml

 <?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
<module name="Cellularisrael_Mobileplans" setup_version="1.0.0">
    <module name="Magento_Backend"/>
</module>
</config>

Answer 1

The solution to my issue ended up being related to the docker container that I was using to run my code. Something was being cached. When I restarted my computer and then restarted the container everything seemed to be working correctly and my module is showing up once again in the admin panel!