Autocad block not showing in paper space

1. Why block is not showing in paper space in AutoCAD?
2. Why is a block not visible in AutoCAD?
3. Why is a layer not showing up in viewport?

Why block is not showing in paper space in AutoCAD?

Check to see if Annotation Display is turned Off

In paper space, do either of the following: Enter ANNOALLVISIBLE on the command line and set it to 1 to have all annotative objects display. Turn on Annotation display from the Status Bar (bottom-right of the drawing window).

Why is a block not visible in AutoCAD?

The block is redefined. The block was inserted as an external reference. The file is corrupted. The AutoCAD user profile is corrupted.

Why is a layer not showing up in viewport?

Go to your layout and double-click in the viewport. Start your Layer Properties Manager. One of the columns is called VP Freeze. This will show layers that are frozen in your viewport but not necessarily in your model.