Welcome to the forum.
Sure, I say why not, try it!
Not sure how long you've might've been a lurker here, but there was a very recent thread where I suggested topping WGDGPS 3.0 with Pinnacle Crystal Mist Spray to enhance the look and reduce static, and it was very well liked by the person who used it.
Dependent upon the product, it might enhance the look, and it might not?
Besides using Cyrystal Mist Spray Detailer, I've tried some others, I know I've tried such like Duragloss Aquawax, and Carpro Reload, which does contain Silica.
So, there should be no harm or foul with doing such. Facts might be, that many of these so called "Silica" sprays contain a high percentage of Polymers as well. Silica has become a marketing "catch phrase" IMO. And many might actually not last any longer than a good Detailer Spray.
Certain products may remain on top, others perhaps can maybe wind up slightly removing and replacing an underlying Sealant, hard to say?
Since you have such on hand already, and like Sylvester Stallone (Rocky) once said, "Go for it!"