I looked it up and the only real post i found about this was from 2015 that stated that spigot does not have any redstone altering code, so they may have changed it since then. You should probably go into creative and import some redstone machines to check if they work.
I have multiverse and plots squared installed, both have check marks next to it, but no matter what i do to it plots squared it will not work or show up in /pl or show up in file manager