Please follow the below steps to configure the general sidebar settings on your website.

Add a Sidebar

• Go to Appearance> Customize> Sidebar Settings
• Click Add New sidebar
• Give the sidebar a name and a unique id.
• Click Save & Publish

You can see the new sidebar in Appearance> Widgets. Add a widget to the sidebar and click save to configure the newly created sidebar.

Configure Sidebar

• Log in to WordPress Admin Panel.
• Go to Appearance> Customize> Sidebar Settings
• Select Sidebars for various Pages, like Home Page, Single Page, Single Post Page, etc. The sidebar selected under the particular pages will be displayed on the page. For example: Home Page Sidebar appears only on home page.
• Click Save & Publish