certbot does not recognize the added VirtualHost

I’m trying to use certbot to get a certificate for my http server running nextcloud (archarm on a raspi). When I run: $ sudo certbot --apache, I get:

$ sudo certbot --apache      
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator apache, Installer apache
No names were found in your configuration files. Please enter in your domain
name(s) (comma and/or space separated)  (Enter 'c' to cancel): 

I then enter my domain: example.duckdns.org upon which I get:

Obtaining a new certificate
Performing the following challenges:
http-01 challenge for example.duckdns.org
Cleaning up challenges
Unable to find a virtual host listening on port 80 which is currently needed for Certbot to prove to the CA that you control your domain. Please add a virtual host for port 80.

While I do have example_duckdns.conf in /etc/httpd/conf/extra which looks like:

<Directory /var/www/html/nextcloud>
    Require all granted
</Directory>

<VirtualHost *:80>
    DocumentRoot "/var/www/html/nextcloud"
    ServerName example.duckdns.org
    ServerAlias example.duckdns.org
    ServerAdmin [email protected]
    ErrorLog "/var/log/httpd/error_log_example_duckdns_org"
    CustomLog "/var/log/httpd/access_log_example_duckdns_org" combined
</VirtualHost>

And I get:

$ apachectl configtest        
Syntax OK

What do I have wrong?

Using: Apache/2.4.43