The public stuff is mostly self explanatory:
@: just the badge stating I'm an abuseipdb contributor, which allows me to make more API calls, because I get massive amounts of ssh spam. I could do more tho 2fauth.: self hosted 2fa. Doesn't work because it fails with Server error 500 and no logs, thanks php
{api,proxy,}.piped.: Piped. The privacy friendly, alternative YT frontend
{autoconfig,autodiscover}.: mail autoconfig/discover service
brauerei.: a little "are you 18+" website for a local brewery
cloud.: Nextcloud
element.: Element web client
git.: Gitlab. Gitea or something when the new management turns out to be shit
gotify.: Gotify, a message server written in go. Mainly used for status messages (eg. systemd jobs failing)
jellyfin.: Jellyfin
jellyseerr.: A torrent/usenet manager for jellyfin, not in use because I'm lazy and just use soap2day etc
lemmy.: the lemmy server, but as federation is wonky, I prefer this account
malpaso.: a test wordpress install for a future website
matrix.: Matrix/Synapse
status.: uptime-kuma, a status service. Also uses gotify for msgs
webodm.: Webodm, a service to stitch photos of drones together to a map

Additionally a mail server.

With that setup, I can also serve multiple "clients" with web and mail servers