It doesn't seem like fireworks appear in the Crafting Helper even if I have the resources.
I gave myself all the recipes with: "/recipe give ocboogie *"
I tried putting Firework Stars in my inventory too
Recipes which have nbt data in the resulting item(s) will not show in the recipe book, this includes:
applying pattern to shield
banner patterns
coloring shulker boxes
copying book, map, banner
fireworks
repairing tools
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How is this a WAI? Firework rockets are an important item gameplay wise, but the game doesn't even teach you how to get them. A major oversight in my opinion. For example in this video at 18:10 you can see the problem.
Obviously this is an extreme scenario, but this man had to walk 7 and a half hours to get back to his base at the end of a long bridge he is building after he had died. (Absurd, but I believe he really did walk there.) He didn't know about rockets since he is doing a blind play through. If only the game had explained to him how he could get back faster.
Firework rockets are now in the recipe book as of snapshot 20w45a. I've seen some of the developers giving a shoutout to the channel I linked in my previous comment. Did his struggles inspire this change? Whatever the case, I thank you Mojang on behalf of Piropito. π

hi @unknown could not agree moreΒ π firework has been very long time ingame and can not make it without crafting table so Recipe should had it long time ago
Considering that Dying Shulker Boxes isn't complicated and is dyed just like everything else. I think that it should be added into the recipe book. So I would suggest that a new post should be made just for dying shulker boxes in the recipe book should be made.