https://www.priority.vision/docs/thesis/custom-hide-posts-sidebar/
Thesis theme comes with posts sidebar. It is placed on all posts and pages, and to hide it there is a custom CSS.
theme documentationhidepostssidebarthesis
https://www.question2answer.org/qa/93383/there-free-plugin-hide-sidebar-q2amarket-link-broken-anyone
free pluginhide sidebar
https://generatepress.com/forums/topic/hide-parent-and-child-category-form-the-sidebar/
Home › Forums › Support › Hide Parent and child category form the sidebar This topic has 1 reply, 2 voices, and was last updated 8 years, 5 months ago by Tom....
hideparentchildcategoryform
https://www.question2answer.org/qa/30862/how-to-hide-sidebar-in-theme?show=30875
hide sidebarthemeq
https://www.question2answer.org/qa/93383/there-free-plugin-hide-sidebar-q2amarket-link-broken-anyone?show=93391
free pluginhide sidebar