Professional black guy here.
For me personally, I wasn't really concerned about representation in that sense. My issues with representation are mainly more focused in it being to a sequel of a story, as well as how it adapts characters they introduce within it. However, I will make the note that Earth-42 Miles appeared to have a thicker accent than Miles, more than likely because his dad is dead in that earth and he would have been raised by his mother primarily. I thought that was a nice little detail (aside from Prowler!Miles looking super cool).
For me, I like I said above, I was more concerned with consistent characterization and all. I like the somewhat evolved Miles, and his dynamic with his parents, including aforementioned scenes like Miles and Rio's Spanish interactions. I also like how Genke didn't immediately become the "guy in the chair", but how it seems like it's going to build up to that. My brother brought up a criticism I agree with, which is that he felt Peter B. should have taken Miles's side earlier, given the almost father-son or student-mentor relationship the two of them had, but we both did like how the Notorious P.B.P. was proud of Miles for holding his own against the Spider-Society.
Miguel O'Hara was a gigachad menace, but while it was great for the movie, I kind of feel a little disheartened that a portrayal of him that was a nudge away from villainous and that kicked his pragmatism up to 11 is going to be what people mainly think of when they think of Spider-Man 2099, especially given that a lot of people are introduced to these characters from movies and TV shows rather than comics (because ironically Marvel Comics is probably more well known for its characters and their portrayals in movies than they are for their comics). Also, people are probably going to think the guy is legitimately a vampire for the same reasons, or think the Spot is a multiversal threat when in the comics he's a D-Tier villain.
On the topic of the Spot, really liked his characterization and him snapping on Miles, especially given how they spruced up his backstory and made it tie in with Miles. Man went from going "please let me rob you!" to almost being on demon time before switching timezones again because demon time was too slow. Seriously, when he mentioned the bagel (hence The Bagel Effect), my guy was almost approaching Eobard Thawne levels of petty.
Felt it was weird they went with preggers Jessica Drew, but whatever. She did kind of switch up from motherly instinct to strict parent, but given the main events take place months after Gwen gets recruited, it's fine with me.
So yeah, that's the representation I focused on: characterization and its consistency as a sequel, with comics, and even within itself as its own movie. It was pretty good on that end, for the most part.
As for racial and sexual representation, it's never been something super important to me. I just like well-written characters, and certain characters can resonate with me even in spite of not having my same race, gender, or sexuality. It still is important to me, but at the same time, I hate when people try to consider me black based on stereotypical stuff, like assuming that because I'm tall I play basketball, etc. Race is a descriptor, not a personality thing, so I don't judge how a black person (or character) is and say that they weren't "black enough" or not. To me, if a person is black, or Hispanic, or Asian, or so on and so forth, they're an accurate representation of their race, because they're individuals within a race, and not every individual is exactly the same. Same thing with sexual representation.
But that's my take on it, anyways.