Substantive definitions of religion determine the inclusion into the category based on the presence of a belief in a distinct reality.
References
Schilbrack, K. (2022). The Concept of Religion. In E. N. Zalta (Ed.), The Stanford Encyclopedia of Philosophy (Summer 2022). Metaphysics Research Lab, Stanford University. https://plato.stanford.edu/archives/sum2022/entries/concept-religion/
Despite this murkiness, all three of these versions are “substantive” definitions of religion because they determine membership in the category in terms of the presence of a belief in a distinctive kind of reality.
Whether a common element can be identified that will coherently ground a substantive definition of “religion” is not a settled question.