Custom Data 1.20.6 I don't know how to execute ? custom:1b is not working

Hey so I'm trying to update 1.20.4 items to 1.20.6 and I usually gave each item a custom tag to run commands off of, however I can't use my former tags as well 1.20.5 removed NBT, how can I fix and rewrite a storable data executable? Basically like lets say I hold a ruby battleaxe how can I detect that besides the model data, I wanna use a custom tag