legacy-printer-app 1.0~b2-0ubuntu6 (armhf binary) in ubuntu mantic

 If the system is using the CUPS Snap or CUPS 3.x the Legacy Printer
 Application makes classically installed (Debian package or from
 source) CUPS drivers available as emulation of a driverless IPP
 printer, as they were part of the Printer Application.
 .
 The driver simply needs to get installed to the places where CUPS would
 expect it, so an installed Debian package of a CUPS driver for example
 would work.
 .
 This is the easiest way to conserve proprietary printer drivers which
 cannot get freely re-built, re-packaged and re-distributed.