Kgonz163 welcome!
Ziva VFX is a general purpose elastic solid and sheet simulator, though we have added features that make it appropriate for the purpose of simulating muscles.
But as it is a general volume preserving simulation tool, you can use it however you like.
There is no requirement for you to even use any muscles at all!
We have some people using Ziva VFX to make stylized cartoon characters using a similar approach to what was done in Zootopia: https://disneyanimation.com/technology/physgrid/
We internally tend to focus on detailed anatomy, because it's both challenging and easy to measure success and failure - but we intend to highlight some of the other ways that Ziva could be used other than for muscular skeletal simulation.
Not all of the material would be still current, but there should be a lot of relevant information still in the "Live With Ziva" webinars that were recorded to our vimeo page:
I hope this helps!
-jj