Unfornately not. Wix Stores is an ‘app’ so the ability to customise it is limited to the design options that are already provided within it.
There is a way to add elements between sections on product pages using Wix Blocks, but that would involve writing some code to make sure it goes in the right ‘slot’.
But even that comes with its own limits. If you want a completely custom designed product page with your own design and layout, you would need to build a custom product page layout from scratch, which would again involve writing a good amount of code.