Upstream report updated. https://github.com/OpenPrinting/cups-filters/issues/472#issuecomment-1173388702
I have added the following comments: 'It is notable that no such issues exist on Debian 10.0 (Buster) with the latest cups-oldstable,now available - driverless queues are created and everything prints as expected - and no trace of avahi, whereas cups[-browsed?] seems to depend on it in 11.3, where avahi cannot be purged without removing very much else too. It is also notable that when adding the driverless MFC-L2740DW printer in cups-web on Buster, there is no "Fax, driverless" option. The fax details seem to be included in driverless PPDs on Bullseye whether a "model" including "Fax" is chosen or not.'
