is there a maximum mesh tri-count per world for mobile?

Documented guidelines can be found here: https://developers.meta.com/horizon-worlds/learn/documentation/custom-model-import/creating-custom-models-for-horizon-worlds/guidance-for-custom-models-budgets-and-model-specs

We dont really pay attention to capacity meters in VR. We just make sure our frames are above 60 on each platform using real-time performance meters. Also assets show their vert count and their texture image sizes in the asset library.