EXHIBIT 99.12

CONSENT OF AUTHOR / EXPERT

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RYDA PEUNG

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I hereby consent to the use of my name, Ryda Peung, and reference to my name, the technical report entitled “Séguéla Gold Mine, Côte d’Ivoire” dated effective December 31, 2025 evaluating the Séguéla Mine of Fortuna Mining Corp. (the “Company”), and the information contained in said technical report described or incorporated by reference in the Company’s Registration Statement on Form F-10 (File No. 333-289971) and in the Company’s Annual Report on Form 40-F for the year ended December 31, 2025 filed with the United States Securities and Exchange Commission.

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Dated: March 26, 2026

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“Ryda Peung”​ ​

Ryda Peung, P.Eng.