I use Unraid as my host OS with a Windows 11 gaming vm. If you say at my computer you would never know it’s not native. I can shutdown/reboot windows and it doesn’t affect any of my home server applications, including a mastodon instance.

Someone on your instance needs to be following for it to get pulled into “all” on your instance. On a large instance that might be rather “all” encompassing, but it’s an important distinction. On a fresh single-user instance “all” will contain zero posts.