I have a 2018 Elantra and to know if it is on the recall list.
This is easy, call your dealer and have the VIN handy and they can check. Also watch your mail because one will be sent.
I don’t see any recalls for the 2018 Elantra.
You can enter your vehicles VIN at the manufactures site to check for incomplete recalls: https://autoservice.hyundaiusa.com/campaignhome?intcmp=footer%20nav;bottom;text;safety%20recalls
Since it is under warranty your best course of action is to have all routine maintenance performed at the dealer. Their computer should flag any recalls when they enter your VIN.
Dealerships will automatically perform recall-related repairs when a car is brought in for maintenance, even if the vehicle owner has not requested those repairs. In theory, car owners are notified by mail of any recalls on their vehicle, but in at least two cases over the years, I have been notified by the dealership of recalls when I brought the car in for routine service.
You enter your VIN # on the NHTSA site.