Saned find scanner on networks with Gecko Next (KDE) but not with OpenSuse

[gioKheper]

Hi, just a small question.
I have a machine with Gecko Next (KDE) and one with Open SUse and a Printer on my local network.
With the Gecko machine I am able to see my Samsung Printer and its scanner, so no problem with it. But on the other machine with OpenSuse 15.4 and OpenSuSeTumbleweed I am not able to see the scanner, while the printer has been seen and works fine.
I copied all the config for saned from my Gecko machine to the OpenSuse Machine, but I get the same result: i.e. the scanner has not seen. Trying to work with the scanner utility from Suse Yast leads to the same situation.
I suspected this was a firewall problem, so I stopped the firewall on my OpenSuse Machines, but this changed nothing.
Of course this is a plus for Gecko, but it would be nice to understand why I got a so different situation.
Thank you all