Linking pages within site

Use some classic HTML…

Link Text

`<a href=”https://yourdomain.com/your-link”>TEXT LINK</a>

Pages Widget…you can show all pages or remove page id’s.
Admin Dashboard>Appearance>Widgets

You could also use the Custom Menu Widget.

First create one at:
Admin Dashboard>Appearance>Menus

Then add the widget to sidebar and chose this menu.