hi kek, i feel very glad to hear that you are making the item element refer to #521! could you please add an nbt-editing feature for the item element? i just take a look of the new item element's vedio, and it looks like doesn't support some cool features based on vanilla item's nbt tags, like custom_model_data. this will give menu creators the possibility to add custom item textures/models based on that nbt tag.

Fixed/Added in FancyMenu v3.4.0!