You are correct that there is a cut relay behind the instrument cluster but this feeds more than just the dome light and map lights so it is likely not the issue.
What I would do is access one of the two lights and check for power. More than likely there is no power, so we need to start tracing the wiring back to where you do have power. I am attaching the wiring diagram below that will help with this.
There are a number of splices so I am thinking we could have a wiring issue, but we need to start with making sure we have no voltage at the lamps.
Also, do you have navigation or RES? That will change which wiring is involved.
The ultimate solution may be running a new wire so that we can restore power but let's take it step by step.
I also attached the location of this relay if you would like to check it as well. You may be able to access it from laying on your back and looking up under the dash.
Images (Click to enlarge)
Monday, October 11th, 2021 AT 6:44 PM