Is there a way of "merging" multiple related communities into a single view in the lemmy 'federation'? detailed question inside

Not sure if I understand this, but I think the way the lemmy federation works is:

• there are multiple servers in the federation (for example, lemmy.world, lemmy.ml, lemmy.whatever, etc.)

• each server can have multiple communities, which are like subreddits

• so, for example, each server can have its own community for photography.

Q1: is my summary correct?

Q2: is there a way to subscribe to multiple related communities across different servers and "merge" those communities into a single view? so that I don't have to click on each separate one? edit: for example, if there are 3 servers that each have a photography community, can I merge them into a single "photography" view?

Sorry if this is a silly question (or if the answer is obvious).