Hello,
2. Please see screenshots http://prntscr.com/gsn3vm > http://prntscr.com/gsn3zn https://www.modernmarketingpartners.com/set-featured-products-woocommerce/, https://prnt.sc/fhj6vf.
3. You can manage single product sidebar widgets from Appearance > Widgets > Single Product Sidebar http://prntscr.com/gsn5vz. Our offers is not a widget, these products are Up-Sells products (Theme Options > E-Commerce > Single Products > Location of upsell products > Sidebar).
7. Edit Newsletter popup static block or provide wp-admin access in Private Content.
Regards