I ... can’t tell if this is an ad or not. Hahaha!

“Can you tell me more about the site that powers https://pathedits.com/ ...”

It is Shopify. These days, it is probably a fair bet that if you run into a webshop, it is going to be powered by Shopify. And they do produce some interesting open source projects for the world to use, including putting money into generic frameworks for building websites that aren’t shops (like Remix).