In the real world, the discontinuance IF REAL is probably due to lack of customer demand or the vendor of baked goods being discontinued.
In the real world, Mrs. SVPete and I were at a local BBQ restaurant last weekend, and they had plenty of brownies (not made in-house).
In the real world, tariffs, if imposed on cacao or cocoa, would not have been in force long enough to disrupt the availability of either, or to force up the prices of said commodities on hand in the US.
The Real World is Reich-Wing.