I started all over again. This time CUPS was properly installed. The printer was found too, by Balena-Cups (Xerox 6125). Sadly there was no listed printer fir the Xerox. I went to https://www.openprinting.org/printer/
Searched for my printer Xerox/Xerox-Phaser_6125 and got this result:
Xerox Phaser 6125
Color laser printer, max. 600x600 dpi, this is a Paperweight
Look for help in our forum for printers from Xerox and Tektronix.
Throughput = 16 Foomatic entry made by PPDtoXML T/G 0.05
I have no idea what that means by my guess is that ‘Paperweight’ means that I can forget it.
The links to the forum are dead, but does the last line mean that there is a PPD???
It seems that I have a PPD, Installed it. My iPhone/iPad recognizes the printer as an air printer, though the printer doesn’t print. The print jubs appear in CUPS. But not in windows According to windows the printer is offline. It seems all the effort has been in vain. I probably could’ve purchased an air printer ready color laser printer if I had billed the hours fooling around to get it running