[wintogreen74]

Your understanding is one approach, but the composition can occur anywhere in the pipeline from SSR to client runtime composition, or in-between (example: at a CDN). eCommerce CAN be a good example, as things like the shopping cart, product catalog and recommendations split nicely on the front end without (typically) sharing backend or state. It helps to look at examples, some notable ones being the Spotify "adventure" and Dazn, as well as Ikea's overall philosophy & motivation for a variant on micro front ends (vertically segmented systems).