How to set ssl certs to virtualhost digitalocean

I have set multidomain in the VPS DigitalOcean Ubuntu 20.04.

In the configuration of the secondary domain, I would like to set up an SSL security certificate and then do it on port 443. but if I set it in the conf it doesn’t work. What am I doing wrong?

I am attaching the configuration on ports 80 and 443:

PORT 80

<VirtualHost *:80>
        ServerAdmin webmaster@localhost
        ServerName example.tv
        ServerAlias www.example.tv
        DocumentRoot /var/www/example.tv/public_html
		
	<Directory /var/www/example.tv/public_html/>
            Options Indexes FollowSymLinks
            AllowOverride All
            Require all granted
        </Directory>

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

        <IfModule mod_dir.c>
            DirectoryIndex index.php index.pl index.cgi index.html index.xhtml index.htm
        </IfModule>
</VirtualHost>

PORT 443

<VirtualHost *:443>
        ServerAdmin webmaster@localhost
        ServerName example.tv
        ServerAlias www.example.tv
        DocumentRoot /var/www/example.tv/public_html
		
		SSLEngine on
		SSLCertificateFile /etc/ssl/example.crt
		SSLCertificateKeyFile /etc/ssl/private/example.key
		SSLCertificateChainFile /etc/ssl/example.ca-bundle

        <Directory /var/www/example.tv/public_html/>
            Options Indexes FollowSymLinks
            AllowOverride All
            Require all granted
        </Directory>

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

        <IfModule mod_dir.c>
            DirectoryIndex index.php index.pl index.cgi index.html index.xhtml index.htm
        </IfModule>
</VirtualHost>

The second set doesn’t function.