Hi @jbc221321,
Welcome to Plotly forum!
There is no dedicated Plotly chart for what you are calling a 3d histogram, but you can follow this discussion on a workaround for your 2d parallel histograms, placed in the 3D space:
https://community.plotly.com/t/adding-a-shape-to-a-3d-plot/1441/8.
This one is a 3D histogram: https://plotly.com/~empet/15253.
Thank you for your reply