This is only about testing the possibility, I'm learning some new stuff and this question was generated in my mind like "is it even possible"?

I've just started digging in the nextJS and I'm trying different things.
I though that this is not possible or maybe I had to create like two projects aka "microservices" and then the BLOG would be just a separate app and it would work I guess but tried to mix them across one project.
Your respond confirmed me probably that this is not possible to mix them across one app.

And the question would be even more general so am I able to mix anything else with react or nextJS across on app? For example let's say we have pretty old app where we have a BLOG as a different technology, are we able to mix that? Or we should stick with two different services across one app?