Discussion on whether reaction order = stoichiometric coefficients

[jiweiqi]

E.g., Q1

[yewalenikhil65]

https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Kinetics/03%3A_Rate_Laws/3.02%3A_Reaction_Mechanisms/3.2.01%3A_Elementary_Reactions

I find this explanation useful. The answer in stackexchange you have posted seems perfect with this explanation.
reaction order = stoichiometric coeffficients for elementary reactions, but not so for non-elementary reactions(set of elementary steps)

another good example of multi-step(non-elementary) reactions is here https://en.wikipedia.org/wiki/Molecularity#Difference_between_molecularity_and_order_of_reaction

[jiweiqi]

Thanks, Nikhil for sharing the links. They are very useful.

Following this logic, for inferencing non-elementary reactions (often called lumped reactions), it is not necessary to assume the reaction orders are integers as well. They are not even following a power law.