I had to set this in my config.h (qmk firmware) to have all the LEDs light up:
#define RGBLED_NUM 72
#define RGBLED_SPLIT \
{ 36, 36 }
While the standard Sofle RGB only has 70 LEDs defined.
When one of these lights doesnt work, it's often the previous light in the series that's not fully connected. That being said, the fact that you have the same issue on both halves suggests the possibility that they are not being signaled in the firmware. I'd check both.
Ergonomic, split and other weird keyboards
Posts must be of/about keyboards that have a clear delineation between the left and right halves of the keyboard, column stagger, or both. This includes one-handed (one half doesn't exist, what clearer delineation is that!?)
i.e. no regular non-split¹ row-stagger and no non-split¹ ortholinear²
¹ split meaning a separation of the halves, whether fixed in place or entirely separate, both are fine.
² ortholinear meaning keys layed out in a grid
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