Hi 1182, welcome! Fellow user here.
There’s no way to show just items of a certain level. I wish there were! However, there is a pretty good workaround using the parent search operator.
In the image below I’ve got a bunch of projects by status. The projects might have sub-items, they might not, so it’s normally a pain to show just the projects. But I’ve marked each status with the #status tag, so I can now find every item of of level 2 by searching for parent:#status. Here’s what it looks like:
This works pretty well for me. I hope it’s helpful to you too.