Can you please guide us on how to change default sort order preference in categories?

Sorting is the process of arranging the products in a certain sequence or sort order according to specific rules. You can manually define the sort order of the products to have more control over how products are sorted on the storefront.

Please go to the link given below to know the steps to sort products in a category:
https://help.storehippo.com/topic/sort-order