Their shape and look can resemble some homemade soap bar slices. At room temperature, their sweetness and texture reminds me of microwaved red bean cake. :meow-melt:
They came in a variety of looks. They could be one solid color, opaque, slightly translucent, have red beans and/or black sesame inside, or be striped like the above pic. Mainly saw them in the colors white, green, brownish-red, brown, pink, and dark grey w/ black specks.
It didn't have kuih's common ingredient of coconut, but kuih looks so similar, you might be right.
This and Hishi mochi seem like the most precise guesses. However, Hishi mochi seems to only come in a set of 3 colors. So the variety of kuih's appearance seems more spot-on.
The Indonesian ones tend to have coconut, but it's kind of a generic term with lots of regional variation, so hopefully it's a helpful search term at least
Godspeed treat hunter :rat-salute-2: