If you are referring to the one that came out for the 2015’s - that was originally designed for the S550 Cobra Jet, nope, it won’t work at all.
I have it (for sale in classifieds). I removed it off my prior 2016 before the Buy Back and was going to use it on my 2018. The holes for securing it to the rad support are different (don’t line up with a 2018+ mounting points) as well as the actual factory prop rod securing positions on the cover are different (2018+ is in different position).
There’s currently nothing available for the 2018+.
And that goes for the MMD Radiator Extension Covers also. Ordered a set for my wife's 2016 and when they came in, decided to check them out on my 2018 just to see if they could be modified to work. No dice! Different locations for the mounting holes and even the overall shape is off enough to make it easier to fabricate my own or wait for a vendor to finally produce them.