I think something a lot of individuals missed, or maybe my interpretation is just entirely wrong, is that Jax is not Leeroy.
So, unlike everyone else (seemingly), Leeroy got his brain scanned at his lowest point in his life. He had admitted something deeply personal (presumably him questioning his gender identity) to his very manipulative and abusive mother. She did such things, he pushed her and ran. In his mind, there is a good chance he just killed her. Then, hes homeless.
Loneliness and isolation are powerful and dangerous things, thats partially Jax's whole character arc. Leeroy wasn't even at rock bottom, he was below the rock. And then, his brain got scanned.
That scan we know as jax. A manipulative and abusive person, who pushes everyone away and almost craves loneliness and isolation, feeling he deserved it.
Jax as a person is not leeroy, HE IS LEEROY'S ROCK BOTTOM
Imagine your lowest and most depressing moments in your life as person. Jax is literally the embodiment of self hate, self nothing, and entering a spiral that may end you. They are not the same people, Jax arguably isn't even a person, but an emotional state.
We see this at the end in the slide show. Leeroy, seemingly, is friends with the irl versions of everyone, (or that's how i interpreted it). They found each other, fate had it. But that's the thing, he's friends with them. He's hanging with them at The triangle bar, run by someone his digital self hates and is jealous of. He goes onto the same bus as them.
Something else to note is that Leeroy hasn't even transitioned irl, where hes in a much better headspace and people he's friends. Thats why i didn't use she/her in this post, because in neither life had he transitioned, even in the one hes okay in. They're just not ready yet and thats fine. Like Goose said, he goes by Lee for the time being but hasn't transitioned.
Sorry if this was a bit rambling, i just wanted to get my thoughts and interpretation out there.