Change Url Structure

Can you please let me the use case of why you want to make it like that particularly? Kindly do let us know, so that we will let you know accordingly to resolve it.

Previously was using a theme default plugin with url/amp/link structure and a lot of url are already indexed so instead of redirecting I want to change default structure.
Your help will be a great deal for me. Thanks

Sorry for the delay in getting back to you extremely. Can you please refer to the following tutorial and let us know back if you need any assistance? So that we will assist you accordingly.

Reference tutorial: https://ampforwp.com/tutorials/article/how-to-use-various-endpoints-in-amp/