When you open up Anytype on your mobile device you will see your current Widgets along with 3 navigation options at the bottom.
Your widgets are customizable in the same way they are in the sidebar of your desktop application.
To edit and move around your widgets: scroll to the bottom of the list, underneath the Bin you'll find "Edit Widgets"
When you click the button, you'll see a small grey minus sign on the corner of each block. Now you can delete, add, or rearrange your widgets.