[Mystile] Want sidebar on all Pages, but can’t get it to appear

I’m new to WordPress and WooCommerce and am trying to build a WooCommerce site using the Mystile theme. I have a sidebar with the Product Categories, Search and Contact widgets that is appearing on the left sides of my Home page and About page, but not my Shop page (which I have renamed “Browse Props”) or individual product pages. I want it on ALL pages. I have gone around in circles trying to figure this out. I tried the Custom Sidebar plug-in, and the WooSidebars plug in but they didn’t work. I am okay with adding code to PHP pages if need be. Please advise. To see what what I’m talking about, here’s the site so far:

https://georgeglazer.com/wpinv/

Thanks,
Helen