How to add more than 10 individual pages in Blogger

First make a copy of the template!!!

First you need to set the gadget page and edit HTML, and then find (Ctrl+F) for PageList1.
Once you have found that in your HTML code you might see something like this below.

<b:widget id='PageList1' locked='false' title='' type='PageList'/>

Then copy the following code just below. Rename the PageList1 to PageList2

That's it, save and refresh the page.