What needs to be repaired if my power windows, locks and mirrors are all out on my 2007 H3

I can only assume you checked the fuse,s,and if good,i think you may need to check the wiring to the main control switch in the driver door,if it look,s ok,then replace the main switch.

Replace main power window switch, you don't have to take the whole door apart, it's just pry the switch up which is held on by the top and bottom of the switch, no side clamps. Simply unplug the two connectors and plug the new one in. The other option which will work for about a year is to clean the connections where the buttons hit the circuit board, mine were wet, but not a year later, was dry and failing. Better to just replace. Knockoff from Amazon -$26, or AC Delco which is recommended is about $130, I used the $26 one and it works great, "UXCELL" version.