Extend plan for products - product warranty

[renatomateusx]

Hi Team. I hope you are well.

We're a software house and we have a client who wants to create an app for Shopify, offering a product warranty. Which means that we'll have plans that should be selected on the cart, at the time the user selects a product variation and hit "ADD TO CART" button.

So, we'll need:
1 - Add a snippet to cart page.

2 - Add a snippet to product page

3 - Offer a page to the merchant to configure the plans from their admin board inside Shopify store settings.

My questions are:
1 - Can I add a snippet containing a HTML using POLARIS, for the user select the plan (like a dropdown component) ? If so, do you guys have any tutorial or documentation for this?
2 - Can I add a snippet containing a HTML using POLARIS or anything else for the user select or remove the warranty plan he had selected? If so, do you guys have any tutorial or documentation for this?
3 - I know that we can add a admin page for the user, but I'd like to have a tutorial for this, can you guys show me the path?

I appreciate any response on it in order to achieve our goal.

Thank you very much for the impressive work you guys are doing.

[renatomateusx]

@connor_at_rally @Thank you very much for your answer.

can you point me to some tutorial so then I can create snippet from API call?

thansk very much once again