A wheat allergy, though, is fairly common: order of 1% per [1], similar to celiac. And if you're allergic to wheat, then it's suffices to avoid gluten, since wheat contains gluten.

(Also, there are forms of gluten intolerance that are neither a wheat allergy nor celiac.)

[1]: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10097276/