You can wire the controller input in parallel using one controller. Not sure if that ties them together for all functions though. But I have a couple of those and just switch the first one and the second switch trips automatically when the train goes through.
Too, if they are command, program them with the same address.
Yes, it ties them together for all operations. For example, a train triggering the non-derail feature of one switch will cause the switch wired in parallel to also throw.
A word of caution. Wire only one of the yellow ("RSC LIGHTS") wires to the controller if you are flipping the two switches opposite regarding thru and diverging.