framebuffer acceleration

[nnn112358]

The Lichee RV nano + 7inch touchpanel (currently the only LCD available) displays images slowly.
In release of the repository here, 2024-05-28-17-33-82a0b7.img.xz is framebuffer acceleration is disabled.
Also, since the virtual resolution is large, I want this to be the same size as the device.

# fbset
mode "800x1280-0"
        # D: 0.012 MHz, H: 0.011 kHz, V: 0.008 Hz
        geometry 800 1280 800 2560 32
        timings 85208760 137 55 35 2 79 9
        accel false
        rgba 8/0,8/8,8/16,8/24
endmode

Could you please disclose how to enable framebuffer acceleration in the Lichee RV nano.
And, please show me how to do virtual resolution configration.