Sitecore Wildcard Pages with Item Buckets & JSS. If you're new to JSS/Sitecore Headless Services, this article covers the key differences you should know about to make this work.
Recently I have been working on a 10.2 Sitecore JSS (NextJS/React) build using SXA for what I think it is best for which is adding Tenants and Sites and managing the Content Tree with Local Data and site-specific Media Library and Data Template management.