Hi there! Julianne from Mixpanel Support here.
Mixpanel doesn’t currently support creating a native Gaussian/ bell-curve visualization directly in reports. The closest in-product option would be to use Custom Buckets in Insights to group the numeric values into ranges and visualize the counts as a bar chart. This gives a histogram-like view of the distribution, though it won’t fit or overlay a Gaussian curve
If you need an actual fitted Gaussian/normal distribution curve, the best workaround would be to export the data and analyze it externally. Apologies for not having better news there.
I’ve also filed this as a product gap on your behalf so our Product team has visibility into the request for native Gaussian curves support. Let me know if you have any questions on the above!