Not a clue, sorry. Ive never used nomadnet and dont know much about it.
WIPocket
stty: 'standard input': Inappropriate ioctl for device means that nomadnet needs to be started in a terminal. You probably want to either add the --daemon flag of nomadnet if you just want to run it in the background (ExecStart=/home/admin/.local/bin/nomadnet --daemon), or run it under tmux instead of systemd to be able to access the interface.
That was not scheduled maintainance, that was theit WaF and Workers dying. https://www.cloudflarestatus.com/incidents/lfrm31y6sw9q https://www.cloudflarestatus.com/incidents/k9ppxftx8bs5
I found it in the settings:

Under "Features":

Do you have any tool to help with that? Ive set this up in the past, but it was pretty hands-on namespacing to get it to work rootless.
Edit: For completeness, here is a script similar to what I use.
It does (not sure how well), but it seems to be a paid feature. Found under Settings -> Split tunneling.
The really simple setup for a single user is just a SSH server with access to storage and the git command. Assuming your laptop and desktop have SSH access to server, you can just:
ssh server git init --bare somerepo
cd somerepo
git remote add server server:somerepo
git push --set-upstream somerepo master #(or main)
and then git clone server:somerepo.
For something slightly higher-tech, I recommend going with Forgejo (the fork of Gitea). It is really easy to set up and low maintainance.
Avoid GitLab for small setups, it is fairly resource hungry.
Just buy 1674920 more of them, way easier.
It sure is unhinged
I would guess real person. Posts without images just get very little traffic, so I assume thats why people are starting to post this.
F12 just opens the developer tools as a whole, but there are also shortcuts to jump right to specific tabs (like the console or debugger, not just the inspector).