Currently the floral staff can only duplicate vanilla's small flowers (except wither rose) using a hard-coded whitelist. But minecraft does provide a #small_flowers tag for specifying those blocks, and other mods are tagging their small flowers with this very tag.

So my suggestion is that instead of whitelist, making a blacklist (preferably specifiable with JSON) may be more compatible with other flower mods. (Or add a switch for users to change between whitelist / blacklist? )

FYI: the mod "bumblezone" use a switchable blacklist / whitelist for their flower duplicating item https://github.com/TelepathicGrunt/Bumblezone-Fabric/blob/dcc631d12275fb192ed541972e73325899e1fa02/src/main/java/com/telepathicgrunt/the_bumblezone/entities/nonliving/PollenPuffEntity.java