Matplotlib visualisations not supported in omniverse?

In my omniverse Isaac SIM rl task:
trying to visualise some of my rl data using matplotlib using Tk i.e. histogram of rewards vs frequency
when I try it tells me Tki is not found
I implemented a workaround where I can view png’s of the plots but thsi is not ideal
I failed to install it through pip install for the python environment packaged into omniverse.
how do i install matpltlib so it can bring up Tk/Qt /Webview interfaces?