The page says fenugreek has clinical research behind testosterone support. Its evidence section also admits the finished product has not been tested in a clinical trial.
Trials on fenugreek extracts exist, and some have looked at testosterone and related markers in men, with modest and mixed findings and specific extract doses. The page links a search results page, not a specific study.
That supports a claim about an ingredient in a trial setting, not about this gummy.
The page is right to admit that the product itself has not been trialed. You have no way to know whether the amount of Testofen per gummy matches any trial. Treat fenugreek as an ingredient with some research and the gummy as unproven, and ask for the per-gummy amount.