Minimizing flicker at high resolutions

Is it possible to minimize (or even get rid of) flickering at high resolutions such as 640x480 or 800x600? At lower resolutions, double buffering can be used but my specific esp32 board doesn't have enough memory to do this with anything above 320x200.

Is there another board I could take a look at that has more memory?

I did try using the `VGA3BitI` driver, but it didn't help unfortunately.