The more important question is what was that bolt supporting on the right side of the picture and will the lack of that support cause a more important failure later? If that's not too much of an issue, then clean the rust off the break, JB Weld it, and keep an eye on it. P.S. I can't judge the support question/issue because my 2022 has the horn mounted differently (under the headlight frame on a separate single purpose horn bracket).
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