Can't get Apache to reverse proxy to Jellyfin

[roomtin]

Hello. I'm trying to get apache2 on debian to be a reverse proxy so that I can connect to jellyfin remotely over https. The problem I'm encountering is that instead of loading jellyfin when I visit my https domain, I get the root apache2 directory that has a few other things in it I'm hosting. I can visit jellyfin locally through the web client using the internal IP of my home server just fine. I followed the apache2 guide here and replaced only the DOMAIN-NAME and SERVER-IP-ADDRESS instances with the correct information. One difference though is that I'm using a subdomain (e.g. media.mycoolserver.com) because I'm hosting other things at my domain, so I've included that full subdomain+domain in the places that asked for the DOMAIN-NAME, but I didn't think it would cause any difference.

I did also need to create the /var/www/html/jellyfin/public_html directory and give apache access to it, but there's nothing in it.

I've run sudo a2ensite for my .conf file in sites-available, and installed all the apache2 addons the jellyfin guide suggests.

systemd doesn't show any errors after reloading apahche2.

I've correctly set up a cert for my subdomain and it's at the location the jellyfin apache2 guide expects.

My uname -a:  Linux brrbox 4.19.0-17-amd64 #1 SMP Debian 4.19.194-3 2021-07-18 x86_64 GNU/Linux

I'm unsure where to look next or what information might be relevant to solve the problem and would appreciate any suggestions. Please advise what other information I should share. Thanks.