maurofc70- I can't help but wonder why you want to do it though....
Note that if you do top the sealant with wax, you won't be able to apply more sealant later unless you strip it back down to bare paint.
If it doesn't look "shiny enough" I'd be really surprised if putting a wax topper on the sealant will fix that. If anything, I'd expect a sealant to shine better than a wax (while potentially lacking in other attributes if you use the "wrong" sealant).