Hello,

Sorry to say but there is no option in Theme Settings available for that for the default Product Layout Sidebar to make Sticky. It requires Customization and this is beyond our limitations and support policy scope. Hope you can understand our limitations.

Although, if you want you can enable the Off-Canvas Sidebar style for the Sidebar on the Shop page: (https://woodmart.xtemos.com/theme-settings-tooltips/off-canvas-sidebar-for-desktop.gif) by going to the Dashboard > Theme Settings > Product archive > Sidebar > Off-Canvas sidebar.

Best Regards