I work for a company that enables businesses to drop eCommerce into their websites

I work for a company that enables businesses to drop eCommerce into their websites. When I started, this was done via a script that embedded an iFrame. This wasn't great for SEO, and some competitors started popping up with SEO-optimized products. Since our core technology is a React app, I realized that we could just mount the React app directly on any path at the customer's domain. I won't get into the exact implementation, but it worked, and our customers' product pages started being indexed just fine. We even ranked competitively with the upstarts who used server-side rendering. We had a prototype in a few months, and then a few months after that we had the version that scaled to 100s of customers. We then decided to build a new version of our product on Remix (SSR framework similar to nextjs). It required us to basically start over from scratch since most of our technologies weren't compatible with Remix. 2 years later, we still aren't quite done. When all is said and done, I'm really curious to see how this new product SEOs compared to the existing one.