Explanation:
Box 1: Site design
If your business scenario doesn't align with any of the scenario-based templates, you can select one of the site design templates. They provide building blocks for you to create custom sites.
There are multiple variations of this template, each with different layout, images, and colors that can be used as-is or customized to meet your needs. You can see the full list of the available site design templates available by selecting the Site designs tab during the site provisioning process.
Box 2: Scenario-based
You can accelerate Power Pages site development by choosing a scenario-based template if your business requirements align with the solution included in the template.
You can select one of the following templates:
The after school program registration template if your scenario requires a registration site to create events and allow stakeholders to register.
The schedule meetings with a financial institution template if your site requires scheduling capabilities, view availability and schedule a meeting online.
*-> The building permit application template if you need to build a site to allow customers to submit applications and receive email notifications on the status of their application.
Box 3: Customer self-service
This template provides the ability for your customers to access self-service support resources, including a searchable knowledge base, activity updates, and feedback options.
Box 4: Blank page
Reference:
https://learn.microsoft.com/en-us/training/modules/power-pages-templates/generic
https://learn.microsoft.com/en-us/training/modules/power-pages-templates/scenario
https://learn.microsoft.com/en-us/training/modules/power-pages-templates/dynamics-365

Based on the requirements mentioned in the question, the best option would be to use a Power Pages site, as it allows authenticated and authorized customers to access their warranty information without requiring a user-assigned Microsoft Power Platform license.

To edit an existing or newly generated text paragraph using Copilot in Power Pages, you should perform the following actions within the design studio:
Step-by-Step Actions to Edit the Paragraph
1. Navigate to the Page Workspace: Open the Power Pages design studio and go to the Pages workspace. Select your About us page from the site navigation tree.
2. Select the Text Component: Click directly on the specific Text component (the box containing your paragraph) to activate its toolbar.
3. Launch Copilot: In the floating text component toolbar that appears, select the Copilot icon.
4. Choose a Refinement Action: Use Copilot's built-in quick refinement options to adjust your paragraph:
-> 4a) Rewrite: Select this option if you want Copilot to keep the core message but generate a completely fresh variation of the text.
-> 4b) Change the tone: Select this option to adapt the text to a different style, such as Professional, Casual, Friendly, Educational, or Excited.
-> 4c) Adjust the length: Select this option to either Condense the text to make it shorter or Expand on it to add more details.
5. Alternatively, Provide a Custom Prompt: If you need specific updates, type your instructions directly into the Copilot text input box (e.g., "Add that we have been booking appointments since
2018"), then click the paper airplane icon or press Enter to submit.
6. Review and Update: Check the preview of the modified text. Once you are satisfied with Copilot's adjustments, select Keep it to update the text component on your page.
Reference:
https://learn.microsoft.com/en-us/power-pages/getting-started/add-text

DLP policies are created in the Power Platform admin center. They affect Power Platform canvas apps and Power Automate flows.
Reference:
https://learn.microsoft.com/en-us/power-platform/admin/wp-data-loss-prevention