Drivers for 1. Samsung SCX 4216F 2. Samsung scx 4521F MacBook Air 15 (sequoia 15.3)

Hewlett-Packard only offers Linux or Windows drivers (XP -> 11) for either Samsung device. No macOS support is shown and that also explains why there is no built-in Apple AirPrint support either.

Unless you are prepared to use these devices with the above supported operating systems, then it is time to acquire new devices that a) have current macOS drivers, or b) their product support mentions they are networkable and Apple AirPrint compatible. Beware of searched sites that offer these drivers for macOS but are not HP sites as it is a scam.

For the Samsung SCX-4216F, not only no AirPrint, but also no IPP/IPPS support, or support for any other common printing protocols, either.

The printer specs do reference GDI, which usually means the printer is, um, quite limited, and uses host-based rendering, and is entirely dependent on the printer vendor drivers to perform that rendering on the host computer.

Somewhat more capable printers will include processing and firmware running on the printer with support for common printing operations, such as rendering PDF or Postscript files, or for receiving IPPS or AirPrint print requests from connected computers. Or sometimes servers for lpr/lps or telnet support, for older (and less secure) compatibility.

GDI is usually a very inexpensive printer, and is tied to the vendor drivers.

If deciding to replace the printer:

• Which Printer Should I Buy? - Apple Community

That means AirPrint minimally, and possibly also IPPS for flexibility.