https://www.tumblr.com/olderthannetfic/720049579053154304/something-that-bugs-me-is-when-people-say-in?source=share
There's definitely a sort of checkbox exclusivity that I see in a lot of fiction, especially in big corporate franchises, that can result in a character having a laundry list of identities that exist for the sake of existing.
This is obviously not what anon is doing, since their characters are inspired by real people (including anon themself!), but when the writing is janky enough it can be difficult to tell if a character's complex identity is for the sake of filling a diversity quota or if it's meant to reflect the author's own experience, or because the author finds the interplay of those identities interesting, or if it serves the story in some meaningful way.
So the real critique isn't if the full list of identities is itself common, or even possible (according to reader with limited experience), in real life. The way to approach characters like this is to look at how their identities are actually handled by the author. Is the identity handled realistically/respectfully, not can you remember meeting someone like that in person.
When you stop thinking about quotas and ticky boxes and policing whose voices count as "own voices", and start instead thinking about what a story might be trying to convey, it all makes a lot more sense and it's easier to tell "I thought it'd be cool to include a character like this person I admire" and "there's not enough representation of people like me in fiction, so I'll write it myself" from "quick! we need a Black character, a disabled character, a bi character, and a Chinese character pronto or the progressives won't buy our product! I know, lets make one character that ticks all those boxes, problem solved."