With that many warning lights illuminated did they (dealership) check to see if/what DTC's it was showing if any? Did they give a reason to suspect the floor harness needed replacing? Reason for asking is it has been documented that rodents will eat wires on newer cars "Rats can't resist wiring in newer cars: Here's why". There is a thread on this forum regarding rodents getting into a Gen X Accord - Rodent problem. Warning graphic picture. Also found another article of a Honda owner having this issue - Rats! Warranty won’t cover rodents chewing wires, so Arlington Heights man sues Honda.
From what I understand and have read when their is a loss of power (battery disconnect) once the car is driven and restarted warnings would go off that were related to that loss of power.
Not to make light of your situation however... After reading this with my car not being my daily driver (and even less driving due to pandemic) I'm glad I make a habit of driving it at least every other week if not more. I take it out on the highway and drive for 60/90 minutes to charge battery, keep components lubricated, get oil up to operating temps, etc., etc. What you are dealing with shows how much technology (electronics) are in our cars and how gremlins can appear when those systems go long periods of time w/o power.
Good luck in getting this resolved and let us know the outcome.
