Both the hexagon and the Merkaba symbolize the number 6. It is the first perfect number, meaning that 6 is both the sum and product of its factors:

1 + 2 + 3 = 6          1 X 2 X 3 = 6

https://www.britannica.com/science/perfect-number

The number 6 is the symbol of the Law of Correspondence, i.e. as above so below. In other words, it is the equilibrium between the microcosm and the macrocosm which mirror each other. It also represents the concept of fractals which are repetitive patterns that can be scaled to any size.

In the Merkaba, the descending tetrahedron represents Spirit or the divine feminine principle, while the ascending tetrahedron represents matter and the divine masculine principle. It symbolizes the embodiment of the Divine (your light body, your soul) into the organic form. In this state, creation naturally occurs and it becomes easier to connect with higher frequency beings and Source.  

 

https://www.flowerofsound.com/the-hidden-meaning-behind-the-hexagon

https://www.aurahealth.io/blog/spiritual-meaning-of-a-hexagon

https://www.soul-flower.com/blog/hexagrams-meaning-sacred-geometry

 

HUICHOL art - the truth of space time

https://www.museumofbeadwork.org/blogs/news/teaching-tuesday-huichol-beadwork