Is there a way to make a combined view of communities?

Odd ask, I know, but is there a way to make a "multi-community" view? To give you a specific example, I am looking at Steam Deck communities and there are two pretty active communities on two different instances. Is there a way to create a view that shows me posts from both (but not just generally merging all my subscribed communities)?

I primarily use Android so an app would be a fine solution if that exists.