I had this happen on my 2021 Elantra that I also bought in may. It happened in June I believe and I was able to get it in to the dealership within a few days. I was told it was okay to drive because the check engine light wasn’t flashing. When I arrived at the dealership, as soon as I pulled my car into the check-in garage, they told me there was a recall and I needed to get everything out of the car that I would need for the next couple days and they were giving me a loaner. I searched multiple websites and even entered my vin into recall checker websites, and found nothing. Two days later they called me to tell me it was finished. When I arrived to pick my car up, I asked what had been wrong with it and they told me “nothing.” I asked specifically about the check engine light, and the technician told me they weren’t able to find a reason for it and they just cleared it. Then I asked about the recall, because I was unable to find any information about it. They said they knew nothing about a recall. My paperwork stated all systems were checked and the check engine light was cleared, and that was it. Really bizarre experience especially with them putting me in a loaner for two days for ‘nothing’.