Why don't Apache virtual hosts work on digital ocean?

Question

Apache HTTP Server

I did everything according to this instruction
https://www.digitalocean.com/community/tutorials/a...
But it always works, only one address (the one that is by default)

I just started to deal with apache today, so I don’t really understand what files to attach to the question
These are the configs in sites-available

spoiler

<VirtualHost *:80>
    ServerAdmin [email protected]
    ServerName semivori.tk
    ServerAlias www.semivori.tk
    DocumentRoot /var/www/semivori.tk/html
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

<VirtualHost *:80>
    ServerAdmin [email protected]
    ServerName semivoriii.tk
    ServerAlias www.semivoriii.tk
    DocumentRoot /var/www/semivoriii.tk/html
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

Perhaps the problem is that on freenom on all domains there is a redirect to IP?)
UPD: as I thought, the problem is redirecting to IP. Solution: install DigitalOcean's nameservers at the domain registrar