How to make a screen with tons of whitespace not look awkward

In my settings page (above), I am currently using tabs to navigate between sections (Rake + tip, Hand rankings, Tiers...). For the insights section of the settings page, the only objective is to allow the users to show or hide the insights section of the app, which is shown in the pink box below.

For the other tabs in settings, I have save buttons. I chose to use save buttons due to the idea that without them, users may be confused about whether or not their changes actually got saved, and if they haven't, what they need to do to save them. I used NN Group's Don’t Prioritize Efficiency Over Expectations to come to this conclusion.

Given that I have save buttons in other tabs, it seems to me that not having it for this tab would introduce confusion.

The screen looks really awkward to me, and I'm having trouble putting my finger on why, or on what I can do to improve it.

One option is to make things bigger and perhaps more centered, but, at least in this case, it would be inconsistent with the rest of the settings, and I presume that in many other situations it would also introduce inconsistency.

And now to make the question more generally applicable: what are some general guidelines one can use for situations like this, where there is very little content and tons of whitespace?