I need to find a phone running on android 8.1 so I can test this out. I have a few old Wind SIM cards in the shoe box. I know that carrier phones can have butchered APN configuration files. Typically, non carrier phones don't have this problem as the APN configuration file is complete with entries for every carrier in the world.
I've seen on some phones for which the manufactuer made a mistake in the APN settings. I've previously had Nokia and Asus devices that had errors in the preprogrammed settings. The Asus model was even Android-based.