The Iris module configured to support ImPlot can be found on GitHub which u can install as a rbxm file or zip file. ImPlot has widgets for: Graphs, Scatter Charts and Pie Charts.
Please note that i have only made the functionality to support my needs hence this is missing functionality the C++ version of ImPlot has.
Normal line graphs but with control points and tangents for curves that can be controlled by the user. You can see it from VFX Forge, VFX Suite and VFX Studio (the free one).
Unfortunately i have not made anything along the lines of however in the future i may work on implementing this,
currently this is just for plotting graphs not for manipulating them.