I need help with a product page

Store Builder
1

i need ( position-sticky ) for product page
like this :
Web Themes & Templates :: HTML :: Admin Templates :: Altair - Admin Material Design UIkit Template

my page :
https://laichegraphics.com/apparel/shoes/adizero-rush-shoes/

2

This is feature of 3rd party theme. For default theme there were modules in the addon marketplace.