If the theory of evolution is undeniable fact, why doesn't it have status of "Law of evolution", like we have other laws which are accepted fact?

 The term "theory" in scientific language does not imply uncertainty or lack of evidence, as it might in everyday language. In scientific terms, a theory is a well-substantiated explanation of some aspect of the natural world that is substantiated through empirical evidence and has stood up to repeated testing and scrutiny.

The term "law" in science typically refers to a statement that describes a consistent and universal relationship observed in nature, often expressed in mathematical terms. Laws, such as Newton's laws of motion, describe observable patterns and relationships but do not necessarily provide explanatory mechanisms.

The theory of evolution, particularly Darwinian evolution, is a comprehensive and widely supported scientific explanation for the diversity of life on Earth. It is not termed a "law" because it encompasses more than a simple, universally quantifiable relationship. The theory of evolution explains not only the patterns observed in the fossil record but also the mechanisms driving these changes, such as natural selection and genetic variation.

In scientific terms, the status of a theory is often considered more robust and comprehensive than that of a law. A theory is a unifying framework that not only describes patterns but also explains the underlying mechanisms. The theory of evolution, for example, provides a detailed explanation of how species change over time through processes such as genetic mutation, natural selection, and adaptation to environmental conditions.

In summary, the theory of evolution is a well-established and foundational concept in biology, supported by an extensive body of evidence from various scientific disciplines. Its status as a theory reflects its explanatory power and its ability to unify a wide range of observations in the field of biology.