Subdomain Redirecting Me to Main Domain Apache2

Apache will try to match a web request with the configured domains in the order they appear in the file system and within the configuration files. As a general rule of thumb, it's better to have subdomains handled before the main site, which should be configured to act as a "catch-all" for any traffic that is unhandled.

With this in mind, your configuration file could be updated to look like this:

<VirtualHost *:8080>
    ServerAdmin 
    ServerName government-jobs.azaanjobs.com
    ServerAlias 
    DocumentRoot /var/www/government-jobs/public_html/
    
    <Directory /var/www/government-jobs/public_html>
        Options Indexes FollowSymLinks MultiViews
        AllowOverride All
        Order allow,deny
        allow from all
    </Directory>
</VirtualHost>

<IfModule mod_ssl.c>
    <VirtualHost *:443>
        ServerAdmin 
        ServerName azaanjobs.com
        ServerAlias  *.azaanjobs.com
        DocumentRoot /var/www/azaanjobs/public_html

        <Directory /var/www/azaanjobs/public_html/>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride All
            Order allow,deny
            allow from all
        </Directory>

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        Include /etc/letsencrypt/options-ssl-apache.conf

        SSLCertificateFile /etc/letsencrypt/live/
        SSLCertificateKeyFile /etc/letsencrypt/live/
    </VirtualHost>
</IfModule>

Notes:

1. the updated configuration file replaces the incorrect value for ServerAlias with a proper .com reference
2. a *.azaanjobs.com alias was added to the main domain to ensure any "unexpected" traffic is captured and routed to a probable location
3. there does not seem to be any configuration on the main site for *:80, which could be an issue if the something in front of the server is not converting non-SSL traffic to use SSL
4. the subdomain is still listening on port 8080, so this will need to be updated to *:80 before visitors can see the site without specifying the port in their browser

Remember to restart Apache after changing the configuration file:

sudo service apache2 restart

This should give you what you need 👍🏻