Is it possible to create a theme extension app that is embedded as a button and opens to a modal?

[nmy1095]

Hi all, I'm new to shopify app development and just had a couple quick questions for more experienced devs.

I plan to create an app that can embed into a user's product page as a button. Once the button is clicked, it'll open a modal that has multiple pages (eg. user completes form on page 1, user completes form on page 2, user submit data on page 3).

1. Is this app structure possible on Shopify stores? From what I've seen online, a lot of apps are built into the admin page for the merchants to use, but I want to create an app that users interact with instead.

2. I planned to create the modal workflow pages with Remix/React components but I'm reading online that only liquid files are supported. Is this true and what's the level of difficulty in creating this app with liquid templates?

If anyone knows an app that follows this structure, please point it in my direction. Thanks in advance.