Transcendentality refers to "the condition of possibility", which was put forward by Kant. He used this concept to express the possibility premise of "why pure mathematics is possible", "why natural science is possible" and "metaphysics is only possible". Transcendentality is different from nature. Nature is not necessarily transcendental, but transcendentalism must be innate.
In fact, in simple terms, transcendentalism is universal inevitability, and there is no need for verification and innate existence.
This word is difficult to make clear in a few simple words and must be understood in Kant's epistemology.