Hi Mauferrusca,
Not 100% sure what you mean by hiding categories, but adding new categories is certainly on the roadmap: https://github.com/getblocklab/block-lab/issues/215
WordPress 5.2 is expected to include a Block Manager, where you should be able to enable / disable default blocks and categories. I wonder if that could be what you’re looking for?
Luke
You can create new categories using the Gutenberg API but I’ve found that Block Lab doesn’t recognize them. You can also white list only certain blocks using the Gutenberg API. I found this helpful https://rudrastyh.com/gutenberg/remove-default-blocks.html
