Read More Block
The Read More Block allows you to insert a link to the current Page or Post. Although you can add this block into your normal Page or Post content, it will be more useful once you can edit your Theme’s templates.
Once you've added the block, there are further options available in the Settings Sidebar. You can have the link open in a new browser tab using the Open in new tab switch. You can also change the Text and Background colours, as well as change various Typography settings like Font size, Appearance, Line height, Letter case & Letter spacing. The Dimensions panels also allows you to specify the padding around the block.