Before you proceed, you need Spaces installed on your phone.
How to re-order tabs in a Space?
Step 1 - Open the Space in which you want to re-order the tabs.
Step 2 - Click on the lined menu icon located on the top right corner of the screen.
Step 3 - SelectReorder tabs.
Step 4 - Move the tabs with the three-lined icon helps you to reorder. When done, click on the right tick button located on the top right corner.
You are done!