All modern phones have an oleophobic coating. Honestly I don’t think I’ve ever encounter a glass touch screen phone without one. I’m pretty sure even my iPhone 3G had one because I remember it getting dirty faster as it got older. Same with screen protectors. I’ve encountered a few that obviously had no sign of a coating, but most have something. The dollar store one definitely didn’t.

And idk about you, but the coating on my phones last a lot longer than a year. Maybe it’s down to how I take care of my devices but the coating lasts a lot longer than a year. My previous phone I had it for only 2 years but its coating was still going reasonably well when I sold it. That was with a screen protector though and I could easily just swap that out for another 2+ years.