I'm not certain that a paper with 36 participants would be representative of all humans.
Searching PubMed non-exhaustively for "honey" and "allergies" yields this paper, Allergies and Natural Alternatives (https://doi.org/10.1016/j.otc.2022.06.005), states, amongst other things, that "The efficacy of these therapies is varied and under-researched." Alas, this seems to be the case.