It exists
I am currently working on a compendium of the pieces

ok I just saw they updated it, but I feel like mine is a better version.
Let's see when I finish it. It should be ready by next week
Mine is more friendly to foreign language speakers, because it does not get too complicated.

tbh I'm not a huge fan of how the existing one is laid out. A little too fancy with the images and imprecise with its definitions.
For instance:
- It says the Amazon moves 1-13 spaces orthogonally and that it's the most powerful piece, neither of which are strictly true. It moves 1+ spaces orthogonally (though on a chess.com 4p chess board 13 is the maximum amount of spaces available in any direction) and may be at a disadvantage against a camel, wildebeest, grasshopper, knight-rider and camel-rider (and if we expand our scope of fairy chess pieces beyond chess.com the amazon has a lot to fear from many other pieces, too).
- It implies that it's compulsory to capture with the dabbaba, even though I assume the thing that was meant is that if it lands on an enemy piece, it'll capture it (which, with normal capturing rules, duh)
- The explanation for how the grasshopper works is phrased in a really confusing way.
- It describes knight moves as "jumping over pieces" which is not a technically correct description since that can also imply pieces occupying the squares it passes won't block it, which is untrue for e.g. the knight-rider or camel-rider. Because of this vague language the description of those pieces gets more complicated than it needs to be.
- "It is blocked if it's a piece on its side" is a really confusing sentence used for describing the knight-rider's alleged inability to capture pieces on its own side. Firstly this depends on the game rules, not the piece definition, and secondly the context of that sentence may also suggest that sideways pieces block it, which is not true when playing with game rules such as "pieces face center".
These are just a few of the problems it has. That's not to say it isn't a great resource in the absence of more precise ones; its existence is definitely a good thing. However, given those flaws, if another guide similar to it is in the works I'm not going to dismiss that effort simply because a guide already exists.

tbh I'm not a huge fan of how the existing one is laid out. A little too fancy with the images and imprecise with its definitions.
For instance:
- It says the Amazon moves 1-13 spaces orthogonally and that it's the most powerful piece, neither of which are strictly true. It moves 1+ spaces orthogonally (though on a chess.com 4p chess board 13 is the maximum amount of spaces available in any direction) and may be at a disadvantage against a camel, wildebeest, grasshopper, knight-rider and camel-rider (and if we expand our scope of fairy chess pieces beyond chess.com the amazon has a lot to fear from many other pieces, too).
- It implies that it's compulsory to capture with the dabbaba, even though I assume the thing that was meant is that if it lands on an enemy piece, it'll capture it (which, with normal capturing rules, duh)
- The explanation for how the grasshopper works is phrased in a really confusing way.
- It describes knight moves as "jumping over pieces" which is not a technically correct description since that can also imply pieces occupying the squares it passes won't block it, which is untrue for e.g. the knight-rider or camel-rider. Because of this vague language the description of those pieces gets more complicated than it needs to be.
- "It is blocked if it's a piece on its side" is a really confusing sentence used for describing the knight-rider's alleged inability to capture pieces on its own side. Firstly this depends on the game rules, not the piece definition, and secondly the context of that sentence may also suggest that sideways pieces block it, which is not true when playing with game rules such as "pieces face center".
These are just a few of the problems it has. That's not to say it isn't a great resource in the absence of more precise ones; its existence is definitely a good thing. However, given those flaws, if another guide similar to it is in the works I'm not going to dismiss that effort simply because a guide already exists.
That's pretty much why I didn't abandon this project. I've been working on it for a while now.
I am currently working on a complete super compendium of all the unorthodox pieces. I will not be done until next week, but it will be better than the "Intro to the Fairy Pieces" on 4pc.
This is because the new server has new pieces and new piece designs.