There is a little trick you can use to easily order your favourite templates because they are alphabetically ordered, just rename them with a number and a letter as the first two letters on the title.
For example, go to the “Templates” location, open the “Papers” folder then “Writing & Note-taking” subfolder. There you can find the “Note Lined” template, tap the name to rename it then type “1 A Note Lined”. This name will make it the first in the list. See attached screenshot. You can use names like “2 A Lined” or “3 A Doublelined” to move them to the second and the third places.