Emojis + Symbols

I don't know how many have noticed this but (I’m talking of the apple emojis=I use an iPad to read & review manga) Mangago seems to allow some emojis for comments, list descriptions & list titles, but not others. And then the tabs will allow even less emojis. Ive been trying to use the symbols to aid me in organising & classifying the Manga i have read {sorry-got autism-so its important to me}. So my question is - has anyone worked out all those that can and cant be used? I've worked out some, but you can only do it 1 at a time so its a time consuming process, so i thought id ask if anyone else had already done it.
OR better yet, does anyone know of a way to get Mangago to accept those emoji in the tabs?

[eg. in the comment section of each Manga it allows the red, green, blue, yellow & purple ’s to show up but not the black, orange, white or brown ones—while only the red one can be used in tabs]