Our theme searches by title, description, SKU, posts, pages. It does not search by tags, brands, categories. https://www.8theme.com/topic/include-brands-in-search-results/
About Shop sidebar, go to Theme Options > General > Enable Classic Widgets Panel > On, then go to Appearance > Widgets > Shop sidebar.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.