The idea of an index to the Shulchan Aruch and Mishna Berura is quite common. I'm interested in a table of contents that goes through each siman of Shulchan Aruch and identifies the topic of each se'if. I'm also interested in the parallel idea for the seifim ketanim of the Mishna Berura and Biur Halacha.
Do such things exist? I haven't found anything looking online.