Sorry that the performance is poor on your machine, can you provide me your system specifications?
Something you can try is reducing the graphics resolution or quality level in the Options, to see if that helps with performance.
Sure, im on Catalina 10.15.6, 32 GB Ram, graphics card is Radeon pro 555X 4GB.
Unfortunately i already set my settings as low as possible on the 2nd/3rd planet due to this issue. It helped a little bit on that planet, but it wasn't a permanent fix.