The histogram in PhotoLab today (2024) looks like a toy. In comparison to the one in Capture One or Lightroom, it is much too basic, too small, cannot be enlarged and will not work nearly as good as the C1 or LR ones.
This would be a request, just like the optional pressing of Option key on Mac for seeing Highlights, Shadows and unsharpening Threshold.
Please don’t forget to add your vote (click on the blue “Vote” button) for your request.
In general, being specific can make a request easier to understand. As far as I read from your post, you want the histogram to be
bigger (or at least scaleable)
more informative (list the things you miss)
reactive to option keys (like e.g. switching the info shown)
Still, elaborating a request does not mean that it’s going to be implemented more quickly. But it helps others to understand what you mean and expect.