Thanks! Yes, Synology is on another device (my Synology NAS). Honestly? Never going to buy Synology again. Once it stops working for whatever reason, I might just make my own. The Synology DSM is a nightmare to work with - absolutely horrible UX and UI. Did you know it doesn't even have a dark mode?
Anyway, yeah, it's mounted to some to my Mini PC running Proxmox and all my other services. I store the media stack's content on there, some service configs, and I'm also currently using Proxmox's built-in backup feature for daily backups of my LXCs/VM, and put those on there too.
Since making this post I've also set up AdGuard and NPMPlus. I now have external and internal domains for my services, depending on if I wanted to make them externally accessible or not. Unfortunately, EE is annoying, and the router they gave me doesn't allow me to set a DNS server, so I have to figure out what I wanna do about that. Right now I've just set it manually on my Linux install for testing.