If f/14 still doesn’t cover the subject, the usual solution is focus stacking: take several shots focused at different distances and combine the sharp parts in software. That lets you keep an aperture near your lens’s best sharpness while getting much more of the product in focus.

Another option is to adjust where you focus. Depth of field extends both in front of and behind the focus plane, often with more of it behind than in front, so focusing slightly closer than the exact middle of the object can help if the nearest parts are soft.

If you want to do it in a single exposure, a tilt-capable lens or bellows setup can tilt the plane of focus so it better matches the shape of the product. That’s more specialized and harder to use, but it can greatly improve sharpness across the subject.

So, in order of practicality for product work: try slightly closer focus placement first, then use focus stacking; use tilt only if you need a one-shot solution.