heavy pagoda
Since the 1.21.4 resource pack update changed item models, the server resource pack is now broken for either 1.21.3 and below, or 1.21.4 and above. Is it possible to make it compatible with both versions? The image below shows what I mean by 'broken' on each version.
sick shell
1.21.2 had resource pack changes and 1.21.4 had even more resource pack changes.
It is possible to have one pack that is compatible on all versions. Instead of learning the intricacies of the changes in new versions, I use ItemsAdder to compile my pack - the latest update produces a ZIP compatible with all versions.