OpenTabletDriver lets you configure the pressure curve via plug-ins.
Instructions for installing Slimy Scylla are here: Slimy Scylla
In the Filters tab, enable Slimy Scylla Pressure Curve
This is what the configuration looks like:
To enable the filter, click Enable Smily Scylla and click Apply.
The settings here will let you configure the pressure curve. Unfortunately, there is no interactive view of the pressure curve inside the OTD UX. However, you can use the demos tool to play with the settings interactively and see the pressure curve https://www.desmos.com/calculator/xo0y9dc9ye
Remember once you make changes to the settings, always click Apply in OTD
https://github.com/Kuuuube/Slimy_Scylla/tree/main/docs
https://github.com/Kuuuube/Slimy_Scylla/blob/main/docs/pressure_curve/pressure_curve.md