+1 on what Crash posted. The 2018s had a bad bunch of screens which are manufactured by LG. New improved screens also made by LG are available on eBay around $400. It’s not difficult to replace the screen, removal of some trim, few bolts and screws and a few ribbon cables. If interested in pricing out the parts the new improved screen part number are:
LA084X01 (SL)(02)
or
LA084X01 (SL)(03)
DO NOT USE any part that ends in 01 as those are the original defective screens.
These part numbers are not Mopar part numbers, they are LG part numbers.
You may also want to try a different dealer as in my case I live in a medium sized metro area. We have several CDJR dealerships. My 2018 8.4 screen delaminated after the warranty expired. I went to the closest Ram dealer and they quoted $1100 for repair. They also have a poor reputation so I typically use the local Jeep/Chrysler dealer. Went to the Jeep dealership and the service advisor said they have seen “dozens and dozens” of 2018 delaminate. Their standard practice is to request a good faith replacement with a refurbished radio. It took one day for approval and there was a $100 deductible. Two weeks later they replaced my defective radio with a refurbished radio with a one year warranty. Out of curiosity I wanted to see if the screen on the refurbished radio was the new part. I pulled it out of the dash and removed enough hardware to see the part number and sure enough it had an (02) part number screen. It’s been in about 15 months now and no issues. If you have the ability to try a different dealer you may find resolution.