It seems that such a hypothesis might be possible.
According to the explanation of Samyama in the Yoga Sutras, "When Samyama is attained, the light of knowledge comes." Here, there are two keywords: "knowledge" and "light." Both of these are consistent with the properties of the Karana dimension, so it seems appropriate to consider that, in terms of the Yoga Sutras, Samyama corresponds to Karana.
Samyama, in the Yoga Sutras, appears to be a continuous process of Dhyana (concentration), Dhyana (meditation), and Samadhi, and it is performed on a single object, which seems to correspond to the cognition of the Karana dimension.
There are various types of Samadhi in the Yoga Sutras, and the Samadhi mentioned here can also be interpreted as an astral Samadhi, but it seems more appropriate to understand it broadly as simply calling the state of Samadhi when the Karana dimension is reached.
When we try to define what Samadhi, which is an element of Samyama, actually is, it becomes quite difficult to give a clear definition. However, it seems simpler to state that the stage of Samyama is simply the Karana dimension.
The Karana dimension mentioned here is based on the classification by Professor Honzan, and is as follows:
Yoga Sutras' Samyama = Professor Honzan's Karana dimension.
As a supplement, while it is "Karana" in Sanskrit, Professor Honzan uses the spelling "Karana." Both have the same meaning.
Classifying based solely on "light" might be a bit rough, but in reality, even when combined with other elements, it somehow feels consistent.
However, this is still just a hypothesis, so I will continue to observe it in the future.