I can access my site via IP address but not via the domain (Ubuntu 20.04, Apache)

I had a domain name configured to point to my old droplet and it worked perfectly for several years. However, I recently created a new droplet using the marketplace LAMP stack (so it’s running Ubuntu 20.04 and Apache 2.4.41). After setting up my site on this new droplet, I updated my domain via the DigitalOcean admin area to point to the new droplet.

As far as I can tell, all of the DNS settings are correct and I’ve verified that the domain is pointing to DigitalOcean’s nameservers. When I ping my domain, either via the terminal or a site like https://www.whatsmydns.net/, I can see it resolving to the new droplet’s IP address. I can also access the site via the new droplet’s IP address. However, I can’t access the site via the domain name. I even tried editing my hosts file, but that didn’t work, either.

I’ve read through this tutorial – https://www.digitalocean.com/community/tutorials/how-to-install-the-apache-web-server-on-ubuntu-20-04 – although Apache was already installed as part of the LAMP stack. My Apache installation seems good to go, but still no site access.