Pre-made room dungeon generation

Hello.

My target is to create 2D dungeon by using pre-made tilemap & sprite rooms.

So one room connects to other, the game randomly chooses next room to create and creates it next to previous one.

I have some ideas but actually want to hear other solutions to formulate a better one

What ideas?

After using hierarchy recently it seems like a great way to set up some premade layouts and then spawn a random room.

I am trying to achieve room generation like this, but not topdown