There are two types of widgets available in WordPress. Dashboard widgets and Sidebar widgets. After login into your website Dashboard, you see a few necessary blocks like site health status, quick draft, etc. These are Dashboard Widgets. When you navigate to Appreacne>Widgets, you will see all sidebar widgets available there.
Dashboard Widgets: Removed unwanted dashboard widgets from this option. Just select which widgets seem irrelevant to you and then save your settings.
Sidebar Widget: After navigating to this option you will see “Disable Gutenberg editor in sidebar widgets” option. Just enable it and there will be more options to remove sidebar widgets.
That’s all the use of Widget Settings option. You can check this create unlimited sidebar doc too.