Hi ,
One thing to double-check in your export settings is that the Refinement and Max Lighting settings are enabled when exporting through Path Tracer. These two settings will only affect realtime/raster renders but enabling them will still cause Twinmotion to perform additional calculations during the rendering process, essentially wasting rendering time. If these were enabled, when you disable them, you should see substantial improvements to rendering speed.
Aside from that, you can further optimize rendering time by hiding any elements of your scene in the scene graph that won't be visible in your renders. You can do this on a per image/video basis to minimize rendering time per media.
Lastly, you could try reducing the image quality, either by decreasing the Path Tracer quality by reducing the Max Bounces and Samples Per Pixel, or by decreasing the image resolution.
Best,
Raghib