NextJS SPA with NextJS micro-frontends - implementing micro-frontends

[Jony-Y]

Hey, community.
Our infrastructure consists of a main SPA (Layout) which hosts all of the micro-apps (most CSR, now introducing SSR).
In the client, we have 0 problems using MF and are pleased with it.

When adding NextJS to the mix, we encounter some architectural decisions since SSR pages return HTML, that doesn't work well for us.
Using MF for SSR:

1. We have to inject the getServerSideProps from the SPA (Layout) to the micro app
2. We need the Layout project to now make an internal server request to import the page and then trigger that getServerSideProps
3. If a micro app have multiple pages, the solution becomes much more complex
4. We need to split MF App (CSR root) with the Page to reduce the latency of import.

Lastly, App Router is not supported

These constraints are not ideal, We are trying to resolve them, but are wondering if MF and NextJS simply don't mix.
Has anyone had proper solution for micro frontends with NextJS and MF? Are Zones the proper solution here?

P.S
We don't have a monorepo for our Client projects and we cant incorporate it. Each micro app is its own girthub repo

[ScriptedAlchemy]

Next.js support in general is reaching end of life, No app router support will arrive either for Vercel products but we will likely support RSC once we have a better prrof of the business value.
Vercel is close to dropping webpack for turbo which will kill it as well.

My suggestion would be if you use Next.js - dont use module federation.
If federation is more important, use ModernJS which has full support for module federation, SSR is in progress as well but we have had it in-house for over a year. PR is almost done. With it comes automatic route discovery, full ssr / data loader support, HMR, remote types, no waterfalls when loading modules.

Vercel designed Next to not work with Module Federation, they seem to work very hard to keep it off their framework.
If you stick with next, iframes / zones would probably be your only bet - but it will have UX and perf problems.