I don’t know what the character limit for LCN names is, but “ABC COMEDY/KIDS” wouldn’t really be that long of an LCN name when you consider that NBN used to have obscenely long ones (which did get cut off on the EPGs of some devices, from memory) like “NBN Digital Mid North Coast” up until around 2014 when the “Digital” was dropped from the LCN name(s) of the main channel.
Of course these days, the style of the LCN names in the non-overlap NBN regions matches those of Nine in metro areas (eg, “Nine Mid North Coast” and “9HD Mid North Coast”) although the NSW Central Coast oddly has “Nine-NBN Central Coast” and “9HD Central Coast”. Wonder how the situation is like up on the Gold Coast…